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Answered by **ahmedhabib047**

Foil this out. first 3x*x

outer 3x*4

Inner -1*x

last -1*4 multiply, combine like terms, and you'll have your answer

Answered by **vivindalka**

(3x - 1)(x +4)== 3x * x + 3x * 4 - 1 * x - 1 * 4 == 3x^2 + 12x - x - 4 = = 3x^2 + 11x - 4

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