since we have 3x to begin with, use some brain sells and you arrive at the answer :)
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OpenStudy (anonymous):
(3x + 1)(x + 2)
OpenStudy (anonymous):
remember that factoring is just the undoing of multiplication.
OpenStudy (anonymous):
The only numbers that multiply to get 2 are 1*2 ? and that doesnt add up to 7
OpenStudy (anonymous):
@Vackious ?
OpenStudy (anonymous):
@ineedyouubiebs yo did you read and understand what i posted ?
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OpenStudy (mathmate):
Grouping is your best friend!
3x^2+7x+2
we look for two integers m and n such that m*n=3*2=6, and m+n=7
So you would find m=6, n=1
By splitting 7x into 6x+1x, we write the expression as
3x^2+6x +
x + 2
=3x(x+2) + (x+2)
Factor out the x+2 to get
(x+2)(3x+1)
exactly as someone posted, but without explanations.