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Mathematics 9 Online
OpenStudy (anonymous):

how do you solve this problem. i'll write it below.

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

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

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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