Question 888283
let x be the length of a side of the square, then
130 = (x+5) * (x+2)
130 = x^2 +7x +10
x^2 +7x -120 = 0
factor the polynomial
(x+15)*(x-8) = 0
x = -15 or x = 8
we want the positive value for x
therefore, the length of a side of the square is 8 cm