02-10-2017
Mathematics

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02-10-2017

4 x^2 - 32 = 8x
-8x -8x

4x^2 - 8x - 32 = 0

Factor the expression ...

4 ( x+2) ( x - 4) = 0

Set the factors equal to 0 ...

x + 2 = 0 x - 4 = 0
-2 -2 +4 +4

x = - 2 or x = 4

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