The area of a square would increase by 25 ft 2 if we increased its side by 1 ft. How long is a side of the square now (before the increase)?

Answer 1

(x + 1)² = x² + 25

Can you solve for x and answer?

Answer 2

(x+1)^2 = x^2 + 25

2x+1 = 25

x = 12