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OpenStudy (anonymous):
Help Please! Reduce rational expression,
x to 2 power-9 5x-x to the 2 power x-4
_______________muli __________________ div ________
x to 2 power-5x x to 2 power-x-12 x to 2 power -8x+16
Thank you.

12 years ago

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OpenStudy (anonymous):
i got 1 but i know that can't be right.

12 years ago
OpenStudy (saifoo.khan):
\[\frac{(x+3)(x-3)}{x(x-5)} \times \frac{-x(x-5)}{(x-4) (x+3)} \times \frac{(x-4)(x-4)}{(x-4)}\]

12 years ago
OpenStudy (saifoo.khan):
wow, that was HUGE.

12 years ago

OpenStudy (anonymous):
yes! so it is 1?

12 years ago
OpenStudy (saifoo.khan):
solving..

12 years ago
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OpenStudy (saifoo.khan):
isnt it -(x-3) ?
im still checking.

12 years ago

OpenStudy (anonymous):
yes it must be x-3, everything else cancels each other out

12 years ago
OpenStudy (anonymous):
?

12 years ago
OpenStudy (saifoo.khan):
Right,
so it's
-x+3

12 years ago

OpenStudy (anonymous):
why is it negative?

12 years ago
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OpenStudy (saifoo.khan):
check in the second fraction, i took -x common instead of x. Later the x cancels leaving behind -1.

12 years ago
OpenStudy (saifoo.khan):
So,
-1( x-3)
-x + 3

12 years ago

OpenStudy (anonymous):
yes, i see... got it, thank you.

12 years ago
OpenStudy (anonymous):
little things like that always screw me up.

12 years ago
OpenStudy (saifoo.khan):
lol.

12 years ago
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OpenStudy (anonymous):
so i have six more problems to do, if your up to it

12 years ago
OpenStudy (saifoo.khan):
Sure.

12 years ago
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