Question

How does this equation even work?

Answer 1

Eventhough this has nothing to do with English, i'll just answer it anyways XD.
The answer is `4x^2 + 12x + 9`

Explanation:

Based on the question,
since it states the length of the square, the area of the square is basicly the length to the power of 2.
This is because a square has equal sides, therefore, the equation to expand is `(2x+3)^2`

`(2x+3)^2`
= 2x(2x+3) + 3(2x+3)
=`4x^2 +6x + 6x + 9`
=`4x^2+12x+9`
=