SOLUTION: Some students simplify: 2x^2 - 32 / x-4 as 2x^2 - 32 / x-4 = 2x-8 Choose values of x to show this is not true. Then simplify it correctly. May be someone could help me wit

Algebra ->  Algebra  -> Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Some students simplify: 2x^2 - 32 / x-4 as 2x^2 - 32 / x-4 = 2x-8 Choose values of x to show this is not true. Then simplify it correctly. May be someone could help me wit      Log On

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Question 144498: Some students simplify:
2x^2 - 32 / x-4 as 2x^2 - 32 / x-4 = 2x-8
Choose values of x to show this is not true. Then simplify it correctly.
May be someone could help me with thise problem.
Answer by stanbon(48558) About Me  (Show Source):
You can put this solution on YOUR website!
Some students simplify:
2x^2 - 32 / x-4 as 2x^2 - 32 / x-4 = 2x-8
Choose values of x to show this is not true.
Let x=0
You get -32/-4 = -8 which is incorrect.
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Then simplify it correctly.
(2x^2-32)/(x-4) = [2(x-4)(x+4)]/(x-4) = 2(x+4) = 2x+8
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Cheers,
Stan H.