Question

Question 8 of 40

Factor this polynomial completely.
x2 + 3x - 18
O A. (x-2)(x + 9)
O B. (x+3)(x-6)
O C. (x - 3)(x-6)
O D. (x - 3)(x+6)

Answer 1

`D.\:\left(x-3\right)\left(x+6\right)`

Explanation:

`x^2 + 3x - 18`

`\left(x^2-3x\right)+\left(6x-18\right)`

`\left(x^2-3x\right):x\left(x-3\right)`

`\left(6x-18\right):6\left(x-3\right)`

`x\left(x-3\right)+6\left(x-3\right)`

Factor, common term:- x-3

`\left(x-3\right)\left(x+6\right)`

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