Friday
October 24, 2014

Homework Help: Algebra

Posted by Sara on Friday, July 20, 2007 at 6:33pm.

(x)/(x-3)-4-(2x-5)/(x+2)

I posted something before this, so now this is how far I got.
The answer I know is -(5x^2-17x-9)/(x-3)(x+2)

first I get

(x)(x+2)/(x-3)(x+2)- (4)(x-3)(x+2)/(x-3)(x+2)-(2x-5)(x-3)/(x-3)(x+2)
Then I get

x^2+2x-4x^2-4x-24-2x^2-11x+15 (for the top)

When I put everything together I get

(-5x^2 -13x -9)/ (x-3)(x+2)

as you can see however I am having a problem with + and - because I get -13x instead of -17x so could you look at what I am doing wrong and explain it to me?

The top should be this:

x^2 + 2x - 4x^2 + 4x + 24 - 2x^2 + 11x - 15

Combining like terms:

-5x^2 + 17x + 9

Factoring out the negative gives this:

-(5x^2 - 17x - 9)

This should help you see the answer given:

-(5x^2-17x-9)/(x-3)(x+2)

I hope this helps. Watch those negative signs because they can be tricky on these types of problems!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Algebra - (x)/(x-3)-4-(2x-5)/(x+2) I posted something before this, so now this ...
Algebra - The answer in the book however says -(5x^2-17x-9)/(x-3)(x+2) so I don'...
Algebra (test corrections) - This problem was on a test and I got it wrong, and ...
Math - 1.3x^2+17x+10 2.5y^8-125 3.a^2-2ab-15b^2 *Please help me.You have to ...
Algebra - 45 6t x 11x I have already posted this question and received an ...
Algebra - x/(x-3)-4-(2x-5)/(x+2) If the problem is this: x/(x - 3) - 4 - (3x - 5...
polynomials - (3+7x)-(16x2+15x2) (3+1x)-(12x+16+0+18x2) Q4: (15+13x2+14x2)+(13x...
polynomials - (3+7x)-(16x2+15x2) (3+1x)-(12x+16+0+18x2) Q4: (15+13x2+14x2)+(13x...
algebra - Okay, how do you factor a polynomial when there is a number in front ...
Algebra I - Thanks Reiny, but I'm still lost. I understand how you multipled by ...

Search
Members