## anonymous one year ago How do you factor with negative exponents? I have a couple of problems to do and none of them make any sense to me

1. Nnesha

like ?

2. anonymous

$x^2(x-1)^{-2}-4(x-1)^{-1}$

3. Nnesha

when you see negative exponent you should flip the fraction $\huge\rm \frac{ x^{-m} }{1 }=\frac{ 1 }{ x^m }$

4. anonymous

I understand but how could you factor it if it's a fraction?

5. anonymous

?

6. Nnesha

oky sorry was answering the phone $\huge\rm \frac{ x^2 }{ (x-1)^2 }-\frac{ 4 }{ (x-1) }$

7. anonymous

No problem

8. Nnesha

alright now find the common denominator :=)

9. Nnesha

brb