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Mathematics
Sadie
29 December, 22:37
Factor this trinomial 12x^2+8x-15
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Ulises Powell
30 December, 01:12
0
Answer: (6x-5) (2x+3)
Step-by-step explanation:
6 and 2 are factors of 12
5and 3 are factors of 15
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Nathanael Mayer
30 December, 02:03
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(6x - 5) (2x + 3).
Step-by-step explanation:
12x^2+8x-15
We use the 'ac' method:
12 * - 15 = - 180. We need two numbers whose product is - 180 and whose sum is + 8 (to make the + 8x).
These are + 18 and - 10 so we have:
12x^2 + 18x - 10x - 15 Now factor by grouping:
= 6x (2x + 3) - 5 (2x + 3) (2x + 3) is common to the 2 parts so:
= (6x - 5) (2x + 3).
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