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Juli2301 [7.4K]
3 years ago
5

2x^2-21x-36. Can someone help me out?

Mathematics
2 answers:
sergeinik [125]3 years ago
8 0
-752<span>thatswhat the answer should be
</span>
azamat3 years ago
6 0
To factor ax^2+bx+c, you look for two factors of a and two factors of c, one factor of a multiple one factor of c, the other factor of a multiple the other factor of c, the sum of the two products makes b
in this case, the two factors of a is 1 and 2, the two factors of c, -36, are -12 and 3. Write them in the following format:
1     -12

2      3
do a "cross-times", that is, 1 times 3, 2 times -12
(1 multiple 3) +(2 multiple -12)=-21
if you don't get a -21, try other factors of -36, switch the factors up/down till you find the right fit.
so (x-12)(2x+3) is the anwer
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