# Math Help - Fractions

1. ## Fractions

Yea umm a little help on adding and subtracting rational expressions.

I think I did this right . .

2x-4/x2+8x-20

2(x-2)/(x-2)(x+10)

2/(x-10)

Is this right and If so I kinda need help on this one too

x2+6x/10*4/x2-36

2. ## Re:

Originally Posted by thebest
Yea umm a little help on adding and subtracting rational expressions.

I think I did this right . .

2x-4/x2+8x-20

2(x-2)/(x-2)(x+10)

2/(x-10)
RE:

3. Originally Posted by thebest

x2+6x/10*4/x2-36
Is this a typo?

4. Originally Posted by thebest
...

Is this right and If so I kinda need help on this one too

x2+6x/10*4/x2-36
Hello,

if I understand the problem correctly it reads:
Code:
x² + 6x       4
-------- * ------- =
10      x² -36

x(x + 6)        4          2x
-------- * ---------- =  -------
10      (x+6)(x-6)     5(x-6)