# Math Help - using -1 as a factor

1. ## using -1 as a factor

somebody help me with this problem

b-7
7-b

2. Originally Posted by michaelmitchell
somebody help me with this problem

b-7
7-b
What are you meant to do? Simplify? $\frac{b - 7}{7 - b} = \frac{-(7 - b)}{7 - b} = -1$.