Say we have a rational function P(x)=(x^2-3x-4)/(x-4)=[(x+1)(x-4)]/(x-4)(adsbygoogle = window.adsbygoogle || []).push({});

I'm a little confused as to why the (x-4) doesn't cancel out. It graphs the same as y=x+1 for x≠4. I feel like I'm missing something from the order of operations.

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# Rational functions w/ common factors don't simplify?

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