SOLUTION: needing help.. multiply {{{(r^2+7r+10)/(3)}}} by {{{(3r-30)/(r^2-5r-50)}}}

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Question 40081: needing help..
multiply %28r%5E2%2B7r%2B10%29%2F%283%29 by %283r-30%29%2F%28r%5E2-5r-50%29
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Always...factor and cancel, factor and cancel....so from
(r^2+7r+10)/3 * (3r-30)/(r^2-5r-50) we get
(r+2)(r+5) / 3 * 3(r-10) / (r-10)(r+5) now look what cancels...we get only...
r+2