1. ## Rational Expressions

Reduce to Fractions whose terms are positive:

1) $- \frac {-y-z}{-x-z}$

2) $- \frac {-a(b+c)}{b(-a-b)}$

I know this is probably really simple, but I'm struggling. If someone could do these step-by-step, that'd be appreciated.

2. Just take the negatives out from the top and bottom. They should then cancel.
At least that seems to be what it is looking for.

3. Originally Posted by PandaPanda
Reduce to Fractions whose terms are positive:

1) $- \frac {-y-z}{-x-z}$
factor out -1 from the numerator and denominator, you get:

$- \frac {-(y + z)}{-(x + z)} = - \frac {y + z}{x + z}$

do a similar thing for the second