Can someone help me solve this one?
$\displaystyle
\frac{10a-5b}{5b-10a}
$
PLZZZZ!!!
Hello hkerbestWhat you need to notice is that if you multiply $\displaystyle (5b-10a)$ by $\displaystyle -1$ you get $\displaystyle (10a-5b)$. Can you see why?
So $\displaystyle \frac{10a-5b}{5b-10a}=\frac{-(5b-10a)}{5b-10a} = -1$
Does that answer your question?
Grandad