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Mathematics 16 Online
OpenStudy (anonymous):

factor the trinomial completely 12x^3-27x^2-27x

OpenStudy (blurbendy):

hint: you can take a 3x out of all of the terms

OpenStudy (anonymous):

that would be the common factor Duh!!!

OpenStudy (blurbendy):

so what do you get if you do that

OpenStudy (anonymous):

so I get 3x(4x^2-9x-9)?

OpenStudy (blurbendy):

perfect

OpenStudy (anonymous):

so that's my answer?

OpenStudy (blurbendy):

you can factor 4x^2 - 9x - 9

OpenStudy (blurbendy):

do you know the quadratic formula?

OpenStudy (anonymous):

(x-9)(x-1)?

OpenStudy (blurbendy):

nope

OpenStudy (anonymous):

(x+1)?

OpenStudy (blurbendy):

no, it's (x-3)(4x+3)

OpenStudy (anonymous):

why?? how??

OpenStudy (blurbendy):

i got it using the quadratic formula; do you know what that is?

OpenStudy (anonymous):

I do, but I dont understand it. I cant grasp the concept of it.

OpenStudy (blurbendy):

|dw:1368123473245:dw| ax^2 + bx + c = 0

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