SOLUTION: I think there's factoring in this one: {{{x^2+3x=28}}}. Help please?

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Question 8444: I think there's factoring in this one: x%5E2%2B3x=28. Help please?
Answer by bonster(299) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2B3x=28
x%5E2%2B3x-28=0
(x-4)(x+7)=0

if x-4=0
x=4

if x+7=0
x=-7