how do i factor the equation x^2+9x-2x-18 by grouping

i need help grouping this equation
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2 Answers

x^2 +9x-2x-18=0 . . . x^2 +7x-18=0 . . . (x-2)(x+9)=0
by
"Solution: Given x^2+9x-2x-18
x(x+9)-2(x+9)
(x-2)(x+9)"
What is a Common Factor - http://math.tutorvista.com/number-system/common-factors.html
The common factors of two or more whole digits is the biggest whole digit that equally divides all the whole digits.
by Level 4 User (5.6k points)

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