a rectangle has sides of x+3 and x-4 what value of x gives an area of 78?
area is (x+3)(x+4) = 78
x^2 + 7x + 12 = 78
x^2 + 7x - 66 = 0
(x+11)(x-6) = 0
so, the answer is ?
x^2 + 7x + 12 = 78
x^2 + 7x - 66 = 0
(x+11)(x-6) = 0
so, the answer is ?