SOLUTION: Factor. -xv -9v + wx + 9w

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Question 385447: Factor.
-xv -9v + wx + 9w

Answer by Jk22(389) About Me  (Show Source):
You can put this solution on YOUR website!
-xv -9v + wx + 9w |group 2 1st, and 2 last

=-v(x+9) + w(x+9)

=(x+9)(w-v)