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OpenStudy (anonymous):
how do you solve this problem. i'll write it below.
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OpenStudy (anonymous):
\[x^2-3x-18/ x^2-2x-24\div 1/x+4\]
OpenStudy (turingtest):
\[{x^2-3x-18\over x^2-2x-24}\div{1\over x+4}\]
OpenStudy (anonymous):
i'm guessing this is the problem:
oops too fast form me but that's exactly what i was writing...^^^
OpenStudy (turingtest):
did I type it correctly?
OpenStudy (anonymous):
thats the right equation
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OpenStudy (turingtest):
first step is to factor the left side as much as possible
OpenStudy (turingtest):
can you factor\[x^2-3x-18\]can you factor\[x^2-2x-24\]?
OpenStudy (anonymous):
yeah, give me a sec to work it out.
OpenStudy (anonymous):
okay so for the first equation the answer is (x-6)(x-3)
OpenStudy (turingtest):
careful
(-)(-)=+
so (-6)(-3)=+18 and we want -18
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OpenStudy (turingtest):
we also want the two numbers to add to the middle term, -3, and
-3+(-6)=-9 not -3
OpenStudy (turingtest):
(hint: the numbers are right but the signs need adjustment)
OpenStudy (anonymous):
I don't know what signs i messed up on. the only numbers i can get is -6 and 3
OpenStudy (turingtest):
yes, so it should be (x-6)(x+3)
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