# How do you find the restricted values of x or the rational expression #(x^3-2x^2-8x)/(x^2-4x)#?

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Johnson Z.
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Dec 16, 2015

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Start by simplifying the equation:

Recall that any fraction cannot have a denominator of

**Finding the restrictions**

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NagrajB
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Dec 16, 2015

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x cannot be zero

x cannot be 4

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x can be cancelled in both numerator and denominator if and only if x not equal to zero

x - 4 cannot be cancelled if x = 0

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