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OpenStudy (anonymous):
Using complete sentences, explain how to factor . Be sure that the final factorization (or "answer") is a part of your explanation
2x2 + 13x + 15
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OpenStudy (blurbendy):
you need 2x^2 so you can say
(2x + ) (x + )
can you fill in the rest?
OpenStudy (anonymous):
How
OpenStudy (blurbendy):
well you need two things to multiply to get 15, and two things to add to get 13x
OpenStudy (blurbendy):
what two things multiply to 15?
OpenStudy (anonymous):
5 and 3
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OpenStudy (blurbendy):
now which goes with 2x and which goes with x?
OpenStudy (blurbendy):
to guarantee you get 13
OpenStudy (anonymous):
WHat
OpenStudy (anonymous):
10 AND 3
OpenStudy (blurbendy):
(2x + 5 or 3) (x + 5 or 3)
which one will make sure you get 13x
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OpenStudy (anonymous):
the first one
OpenStudy (blurbendy):
2x + 5?
or 2x + 3?
OpenStudy (anonymous):
2x+3
OpenStudy (blurbendy):
good, so the other one will be (x+5)
OpenStudy (anonymous):
SO the final answer would be (2x+3)(x+5)
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OpenStudy (blurbendy):
yes
OpenStudy (anonymous):
But how should i explain how to do this
OpenStudy (blurbendy):
reread what ive said while i helped you. you should be able to explain.
(2x + 3)(x +5)
if you foil this, you get 2x^2 + 13x + 15
OpenStudy (anonymous):
ok thanks
OpenStudy (blurbendy):
yw
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