scotb9175 scotb9175

05-05-2020
Mathematics

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Completely factor this quadratic expression: 4x2 + 12x − 72.

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kgreelish12 kgreelish12

05-05-2020

Answer:

4(x-3)(x+6)

Step-by-step explanation:

Factor out the 4

4(x2 + 3x - 18)

what 2 numbers add to 3 and multiply to - 18?

-3 and 6

therefore 4x2 + 12x − 72 = 4(x-3)(x+6)

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lawal223 lawal223

05-05-2020

Answer:

(4x² + 24x)- (12x + 72)

4x( x+ 6)- 12(x + 6)

ans = (4x - 12)(x + 6)

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