Question 170497
Choose values of x to show that 2x^2-32/x-4 does not simplify to 2x-8. 
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Assume [2x^2-32/x-4] = [2x-8]
Test x = 0
You get [(0-32)/(0-4)] = [0-8]
or [-32/-4] = [-8]
or 8 = -8 , which is wrong.
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This shows that the assumed equality is not true.
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Cheers,
Stan H.