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Factor completely. 4x3 + 12x2 + 3x + 9
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12+24+3x+9 36+3x+9 45+3x
Incorrect.
A. (4x2 + 3)(x + 3) B. (4x2 + 3)(x + 9) C. (12x2 + 3)(x + 3) D. (12x2 + 3)(x + 9)
Factor by grouping, 4x^2(x +3) + 3(x+3) = (4x^2 + 3)(x+3)
choice A is correct.
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