Asked by lynn
a rectangle has sides of x+3 and x-4 what value of x gives an area of 78?
Answers
Answered by
Steve
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 ?
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