Question

Suppose a square has sides that are 2x cm long , and that if each side were decreased by 3 cm the area of the square would become 80 cm2. Which equation below would solve this problem for x? (set up an equation and begin to solve it; don't try to solve it completely).



a. 2x2 - 12x - 89 = 0

b. 2x2 + 12x - 89 = 0

c. 4x2 - 6x - 71 = 0

d. 4x2 - 12x - 71 = 0

e. 4x2 - 89= 0

Answer 1

D

Answer 2

(2x-3)^2=80