SOLUTION: solving polynomial equations by factoring 5r^3 +15r^2-20r the solutions is ___________ ____

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Question 316972: solving polynomial equations by factoring
5r^3 +15r^2-20r
the solutions is ________________
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
5r%5E3%2B15r%5E2-20r factor out 5r
5r%28r%5E2%2B3r-4%29 two numbers that multiply to get -4 and add to get +3 are -1&4
5r%28r-1%29%28r%2B4%29completely factored