Can somebody help me please? Simplify (x − 4)(x2 + 3x + 2). x3 − x2 + 14x − 8 x3 + 7x2 − 10x − 8 x3 − x2 − 10x − 8 x3 + 7x2 + 14x − 8

asked Dec 10, 2017 125k views

3 votes

Can somebody help me please? Simplify (x − 4)(x2 + 3x + 2).

x3 − x2 + 14x − 8
x3 + 7x2 − 10x − 8
x3 − x2 − 10x − 8
x3 + 7x2 + 14x − 8

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4 votes

(x - 4)(x^2 + 3x + 2) =
x(x^2 + 3x + 2) - 4(x^2 + 3x + 2) =
x^3 + 3x^2 + 2x - 4x^2 - 12x - 8 =
x^3 -x^2 - 10x - 8

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