1. simplify...

simplify fully

25-x²
_____
25+5x

the ____ is divided by..

I don't know how to do this.

Thanks..

2. Originally Posted by Danielisew
simplify fully

25-x²
_____
25+5x

the ____ is divided by..

I don't know how to do this.

Thanks..
The answer is factor, factor, factor!
$25 - x^2 = 5^2 - x^2$ is the difference between two squares, so
$25 - x^2 = (5 + x)(5 - x)$

$25 + 5x = 5(5 + x)$

So....
$\frac{25 - x^2}{25 + 5x} = \frac{(5 + x)(5 - x)}{5(5 + x)} = \frac{5 - x}{5}$; $x \neq -5$

-Dan