Special Products of Binomials

Which one is the product of this binomial sum squared?

 $\left(a+b\right)^2$  

•  $a^{2\ }-b^2$  

•  $a^{2\ }+2ab+b^2$  

•  $a^2-2ab+b^2$  

•  $a^{2\ }+b^2$  

What is the product of this binomial difference?

 $\left(a-b\right)^2$  

•  $a^{2\ }-b^2$  

•  $a^2+2ab+b^2$  

•  $a^2-2ab+b^2$  

•  $\frac{n\left(n+2\right)}{2}$  

What is the product?

 $\left(x-y\right)^2$  

•  $x^2-2xy+y^2$  

•  $x^2+2xy-y^2$  

•  $x^2+2xy+y^2$  

•  $-x^2-2xy+y^2$  

What is the product?

 $\left(x+5\right)^2$  

•  $x^2-10x-25$  

•  $-x^2+10x-25$  

•  $x^2+10x-25$  

•  $x^2+10x+25$  

What is the product?

 $\left(a+b\right)\left(a-b\right)$  

•  $a^2-b^2$  

•  $a^2+2ab+b^2$  

•  $a^2-2ab+b^2$  

•  $-a^2+b^2$  

What is the product?

 $\left(x+3\right)\left(x-3\right)$  

•  $x^2-3$  

•  $x-9$  

•  $x^2-9$  

•  $x^2+9$  

What is the Product?

 $\left(2y+z\right)^2$  

•  $4y^2+4yz+z^2$  

•  $4y^2-4yz+z^2$  

•  $4y^2-z^2$  

•  $\sqrt{b-4ac}$  

What is the Produtc?

 $\left(m-2n\right)^2$  

•  $m^2+4mn+n^2$  

•  $m^2-4mn+4n^2$  

•  $-m^2-4mn-4n^2$  

•  $m^2+4mn-4n^2$  

Which one is a difference of squares?

• $a^2+2ab+b^2$

• $a^2-2ab+b^2$

• $a^2-b^2$

Which ones are perfect square trinomials? hint there are two.

• $a^2+2ab+b^2$

• $a^2-2ab+b^2$

• $a^2-b^2$

• $\sum_{n=1}^{\infty}\frac{1}{n^2}$