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Mathematics 18 Online
OpenStudy (anonymous):

Factor the trinomial completely: 3x^2-20x-7

OpenStudy (luigi0210):

Hello @ktawneil , Welcome to Openstudy :)

OpenStudy (luigi0210):

Do you know how to start?

OpenStudy (anonymous):

i started playing around with numbers and did (3x-6)(1x-1) but in know thats not right

OpenStudy (zzr0ck3r):

have you heard of the "ac method"

OpenStudy (luigi0210):

That's because 6*1=6

OpenStudy (luigi0210):

-6*-1=6

OpenStudy (luigi0210):

You need 7 and 1

OpenStudy (anonymous):

would it be (3x+7)(1x-1)

OpenStudy (luigi0210):

You got the right numbers, just in the wrong place

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