SOLUTION: factor completely. Please help me. {{{x^2 + 4xy - 21y^2}}}

Algebra ->  Equations -> SOLUTION: factor completely. Please help me. {{{x^2 + 4xy - 21y^2}}}       Log On


   

Question 6329: factor completely. Please help me.
x%5E2+%2B+4xy+-+21y%5E2

Answer by bonster(299) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2+%2B+4xy+-+21y%5E2
(x+7y)(x-3y)