The fist step is to find common factor,but what if there isn't one

The fist step is to find common factor,but what if there isn't one

what is the restriction

Why didnt he factor the numerator as he did for the denominator?

I have to completely factor this expression and I can not figure out where to start.

factor the equation

I don't know the steps to this problem.

Dr. Anthon S.

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