Help factoring polynomials?
WILL MEDAL AND FAN!!
2x^3 - 12x^2 + 18 - 3x
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OpenStudy (anonymous):
-15X?
OpenStudy (anonymous):
But would you also add the 3 and 2 exponents?
OpenStudy (anonymous):
not add the exponents multiply
OpenStudy (anonymous):
@JuliaShepherd have you ever learned about? P.E.M.D.A.S.? use that method and you will get the answer
OpenStudy (anonymous):
So 15x^6? Then what?
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jimthompson5910 (jim_thompson5910):
you can't combine `- 12x^2` with `- 3x`
they aren't like terms
OpenStudy (neonumbrella5115):
I misread the problem @jim_thompson5910
jimthompson5910 (jim_thompson5910):
2x^3 - 12x^2 + 18 - 3x
2x^3 - 12x^2 - 3x + 18 ... swap the last two terms
(2x^3 - 12x^2) + ( - 3x + 18) ... pair up the terms into 2 groups
Do you see what to do next?
OpenStudy (anonymous):
So how do I do it?
OpenStudy (anonymous):
alright @jim_thompson5910 's got this ill leave it to him/her
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OpenStudy (anonymous):
Why do you swap the terms?
jimthompson5910 (jim_thompson5910):
because I'm putting the terms in order of decreasing exponent
jimthompson5910 (jim_thompson5910):
2x^3 - 12x^2 - 3x + 18
is the same as
2x^3 - 12x^2 - 3x^1 + 18x^0
the exponents in order, from left to right, are: 3, 2, 1, 0
OpenStudy (anonymous):
Okay. First you look for a GCF?
OpenStudy (anonymous):
There isn't one....
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jimthompson5910 (jim_thompson5910):
what's the GCF of this first group `(2x^3 - 12x^2) ` ?
OpenStudy (anonymous):
2x^2
jimthompson5910 (jim_thompson5910):
so factor out 2x^2 to get
2x^3 - 12x^2 = 2x^2(________)
fill in the blank
OpenStudy (anonymous):
x-6x
jimthompson5910 (jim_thompson5910):
not quite
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