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Mathematics 17 Online
OpenStudy (anonymous):

Divide...

OpenStudy (anonymous):

OpenStudy (espex):

You may recall that when you divide fractions that you can rewrite the expression as the multiplication of the reciprocal. So your \[\frac{\frac{x^{2}+8x+15}{x^{2}-9}}{\frac{x+5}{x-5}}\] becomes \[\frac{x^{2}+8x+15}{x^{2}-9}*\frac{x-5}{x+5}\]

OpenStudy (espex):

Do you know where to go from here?

OpenStudy (anonymous):

@eSpeX : That's the part I'm having trouble on.

OpenStudy (anonymous):

@eSpeX : The step after that, I mean.

OpenStudy (espex):

I would start by factoring the left hand fraction. I bet there is some simplification that can be done before multiplying.

OpenStudy (anonymous):

@eSpeX : Alright. What do I do after I factor it?

OpenStudy (espex):

What did you get?

OpenStudy (espex):

What did you get when you factored \[x^{2}+8x+15\]

OpenStudy (anonymous):

@eSpeX : (x+5)(x+3)

OpenStudy (espex):

Exactly, good work. Now the first part of your equation looks like \[\frac{(x+5)(x+3)}{x^{2}-9}\]So what do you get if you factor the denominator?

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