What is the expression for the length of a side of a square with an area of X^2+8x+16

Answer 1

You are looking for two identical factors from your expression you provided since squares have the same length and width.

X^2+8x+16 <------ factor the expression

Factor 16 in a way that their factors add up to 8. So that is why I chose 4 and 4.

(x+4)(x+4)

Thus the length and width are both x+4