Question

How would you rewrite the expression using the square of a sum property? (3x + 5)^2

Answer 1

The square of a sum is:

`(a+b)^2=a^2+2ab+b^2`

using it we have:

`\begin{gathered} (3x+5)^2=(3x)^2+2(3x)(5)+5^2 \\ =9x^2+30x+25 \end{gathered}`

therefore we have:

`(3x+5)^2=9x^2+30x+25`