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How do you factor 12x2 - 5x – 2?
Class: 9

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(3x – 2) (9x + 1)

(2x + 2)2

9x + 5

12 + 7x

answer is A.

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Detailed Solution

⇒ 12x2 – 5x – 2
⇒ 12x2 + 3x – 8x – 2
⇒ 3x (4x + 1) –2(4 x + 1)
⇒ (3x – 2) (4x + 1)

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