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I need help!In parallelogram ABCD , AE=x^2−8 and CE=2x .What is AC ?
5 months ago
Q:
I need help!In parallelogram ABCD , AE=x^2−8 and CE=2x .What is AC ?
Accepted Solution
A:
The correct answer is 16
because
x^2 - 8 = 2x
x^2 - 2x - 8 = 0
(x + 2)(x - 4) = 0
x = - 2 or x = 4
(4)^2 - 8 = 16 - 8 = 8
2(8) = 16