Common Core: High School - Algebra : Polynomial Identities and Numerical Relationships: CCSS.Math.Content.HSA-APR.C.4

Study concepts, example questions & explanations for Common Core: High School - Algebra

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All Common Core: High School - Algebra Resources

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Example Questions

Example Question #1 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 10 b\right)^{2}




Possible Answers:

\displaystyle a^{2}

\displaystyle a^{2} + 20 a b

\displaystyle b^{2}

\displaystyle 10 a b + 100 b^{2}

\displaystyle a^{2} + 20 a b + 100 b^{2}

Correct answer:

\displaystyle a^{2} + 20 a b + 100 b^{2}

Explanation:

The first step is to rewrite the problem as follows.


\displaystyle \left(a + 10 b\right)^{2} = \left( a + 10*b \right) \cdot \left( a + 10*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 10 b = 10 a b

Now we multiply the second term of the first expression with the first term of the second expression.


\displaystyle a \cdot 10 b = 10 a b

Now we multiply the last terms of each expression together.

\displaystyle 10 b \cdot 10 b = 100 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 20 a b + 100 b^{2}




Example Question #2 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 14 b\right)^{2}






Possible Answers:

\displaystyle a^{2}


\displaystyle 14 a b + 196 b^{2}

\displaystyle b^{2}

\displaystyle a^{2} + 28 a b + 196 b^{2}

\displaystyle a^{2} + 28 a b


Correct answer:

\displaystyle a^{2} + 28 a b + 196 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 14 b\right)^{2} = \left( a + 14*b \right) \cdot \left( a + 14*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 14 b = 14 a b 

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 14 b = 14 a b

Now we multiply the last terms of each expression together.

\displaystyle 14 b \cdot 14 b = 196 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 28 a b + 196 b^{2}




Example Question #3 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 2 b\right)^{2}





Possible Answers:

\displaystyle a^{2}

\displaystyle a^{2} + 4 a b + 4 b^{2}

\displaystyle a^{2} + 4 a b

\displaystyle b^{2}

\displaystyle 2 a b + 4 b^{2}

Correct answer:

\displaystyle a^{2} + 4 a b + 4 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 2 b\right)^{2} = \left( a + 2*b \right) \cdot \left( a + 2*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 2 b = 2 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 2 b = 2 a b

Now we multiply the last terms of each expression together.

\displaystyle 2 b \cdot 2 b = 4 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 4 a b + 4 b^{2}

Example Question #1 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 17 b\right)^{2}






Possible Answers:

\displaystyle a^{2} + 34 a b + 289 b^{2}

\displaystyle a^{2} + 34 a b

\displaystyle 17 a b + 289 b^{2}

\displaystyle b^{2}

\displaystyle a^{2}

Correct answer:

\displaystyle a^{2} + 34 a b + 289 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 17 b\right)^{2} = \left( a + 17*b \right) \cdot \left( a + 17*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 17 b = 17 a b


Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 17 b = 17 a b

Now we multiply the last terms of each expression together.

\displaystyle 17 b \cdot 17 b = 289 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 34 a b + 289 b^{2}

Example Question #2 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 3 b\right)^{2}





Possible Answers:

\displaystyle b^{2}

\displaystyle a^{2} + 6 a b + 9 b^{2}

\displaystyle 3 a b + 9 b^{2}

\displaystyle a^{2}

\displaystyle a^{2} + 6 a b

Correct answer:

\displaystyle a^{2} + 6 a b + 9 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 3 b\right)^{2} = \left( a + 3*b \right) \cdot \left( a + 3*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 3 b = 3 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 3 b = 3 a b

Now we multiply the last terms of each expression together.

\displaystyle 3 b \cdot 3 b = 9 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 6 a b + 9 b^{2}

Example Question #1 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 2 b\right)^{2}





Possible Answers:

\displaystyle b^{2}

\displaystyle a^{2}

\displaystyle a^{2} + 4 a b

\displaystyle a^{2} + 4 a b + 4 b^{2}

\displaystyle 2 a b + 4 b^{2}

Correct answer:

\displaystyle a^{2} + 4 a b + 4 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 2 b\right)^{2} = \left( a + 2*b \right) \cdot \left( a + 2*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 2 b = 2 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 2 b = 2 a b

Now we multiply the last terms of each expression together.

\displaystyle 2 b \cdot 2 b = 4 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 4 a b + 4 b^{2}




Example Question #2 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 15 b\right)^{2}




Possible Answers:

\displaystyle a^{2}

\displaystyle b^{2}

\displaystyle 15 a b + 225 b^{2}

\displaystyle a^{2} + 30 a b + 225 b^{2}

\displaystyle a^{2} + 30 a b

Correct answer:

\displaystyle a^{2} + 30 a b + 225 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 15 b\right)^{2} = \left( a + 15*b \right) \cdot \left( a + 15*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 15 b = 15 a b


Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 15 b = 15 a b

Now we multiply the last terms of each expression together.

\displaystyle 15 b \cdot 15 b = 225 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 30 a b + 225 b^{2}




Example Question #8 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 7 b\right)^{2}

Possible Answers:

\displaystyle 7 a b + 49 b^{2}

\displaystyle a^{2}

\displaystyle a^{2} + 14 a b + 49 b^{2}

\displaystyle a^{2} + 14 a b

\displaystyle b^{2}

Correct answer:

\displaystyle a^{2} + 14 a b + 49 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 7 b\right)^{2} = \left( a + 7*b \right) \cdot \left( a + 7*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 7 b = 7 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 7 b = 7 a b

Now we multiply the last terms of each expression together.

\displaystyle 7 b \cdot 7 b = 49 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 14 a b + 49 b^{2}




Example Question #9 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 6 b\right)^{2}






Possible Answers:

\displaystyle b^{2}

\displaystyle 6 a b + 36 b^{2}

\displaystyle a^{2} + 12 a b + 36 b^{2}

\displaystyle a^{2} + 12 a b

\displaystyle a^{2}

Correct answer:

\displaystyle a^{2} + 12 a b + 36 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 6 b\right)^{2} = \left( a + 6*b \right) \cdot \left( a + 6*b \right)

Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 6 b = 6 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 6 b = 6 a b

Now we multiply the last terms of each expression together.

\displaystyle 6 b \cdot 6 b = 36 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 12 a b + 36 b^{2}




Example Question #10 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\displaystyle \left(a + 5 b\right)^{2}










Possible Answers:

\displaystyle a^{2}

\displaystyle 5 a b + 25 b^{2}

\displaystyle a^{2} + 10 a b + 25 b^{2}

\displaystyle \ a^{2} + 10 a b

\displaystyle b^{2}

Correct answer:

\displaystyle a^{2} + 10 a b + 25 b^{2}

Explanation:

The first step is to rewrite the problem as follows.

\displaystyle \left(a + 5 b\right)^{2} = \left( a + 5*b \right) \cdot \left( a + 5*b \right)


Now we multiply the first parts of the first and second expression together.

\displaystyle a \cdot a = a^{2}

Now we multiply the first term  of the first expression with the second term of the second expression.

\displaystyle a \cdot 5 b = 5 a b

Now we multiply the second term of the first expression with the first term of the second expression.

\displaystyle a \cdot 5 b = 5 a b

Now we multiply the last terms of each expression together.

\displaystyle 5 b \cdot 5 b = 25 b^{2}

Now we add all these results together, and we get.

\displaystyle a^{2} + 10 a b + 25 b^{2}

All Common Core: High School - Algebra Resources

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