Question

HELP!!!!!!!!!!!!!

The area of a square is defined by, A(x) =x^2 - 18x + 81. Find a polynomial expression that represents the length of the side of the square.

(x - 2)
(x - 3)
(x - 6)
(x - 9)

Answer 1

A(x) = x^2 - 18x + 81
A(x) = (x - 9)(x - 9)
A(x) = (x - 9)^2

the length of the side is (x - 9)