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m_a_m_a [10]
3 years ago
13

Factor this trinomial completely. 12x2 + 8x - 15

Mathematics
2 answers:
saul85 [17]3 years ago
8 0
My answer would be=8x+9
gtnhenbr [62]3 years ago
4 0

Answer:

(6x-5)(2x+3)

Step-by-step explanation:

The numbers that <em>multiply </em>to give a\cdot{c}=12\cdot{-15}=-180 yet <em>add </em>to give b=8 are 18 and –10.

12x^{2}+8x-15\\12x^{2}+18x-10x-15\\6x(2x+3)-5(2x+3)\\(6x-5)(2x+3)

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