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Mathematics
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2 x squared plus x minus 36
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2x^2+x-36?
are you factoring?
yes sorry
(2x+9)(x−4) One Of Those
how do you factor it?
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(x+)(x-) start with this. you know that there is one + and one - because 36 is negative.
ok
the 2 in front of the x^2 means you need the two xs from (x+)(x-) to multiply out to 2x. (2x+)(x-) 2x*x=2x^2
so it is (2x ) (x- ) so far?
yes, not you want to look at -x and -36 you need two number here. they have to add up to x but multiply out to -36
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because of the 2 in front of the two x it doesn't always work this way.
there are no numbers that do that though....
9*-4=-36 right?
oh ya lol
so (2x+9)(x-4)?
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plug them in to (2x+)(x-) (2x+9)(x-4) you can multiply them together to see if it works or not.
you got it
thank you so much!
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