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(x - 9) (
x^(2) - 3x - 2)

User Bluefire
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1 Answer

2 votes

Answer:


\large\boxed{(x-9)(x^2-3x-2)=x^3-12x^2+25x+18}

Explanation:

Use FOIL: (a + b)(c + d) = ac + ad + bc + bd


(x-9)(x^2-3x-2)\\\\=(x)(x^2)+(x)(-3x)+(x)(-2)+(-9)(x^2)+(-9)(-3x)+(-9)(-2)\\\\=x^3-3x^2-2x-9x^2+27x+18\\\\\text{combine like terms}\\\\=x^3+(-3x^2-9x^2)+(-2x+27x)+18\\\\=x^3-12x^2+25x+18

User Bradley Mackey
by
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