SOLUTION: Factor 10r^4+30r^3+5r^2+15r completely.

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Question 958898: Factor 10r^4+30r^3+5r^2+15r completely.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

10r%5E4%2B30r%5E3%2B5r%5E2%2B15r+....factor out 5r
5r%282r%5E3%2B6r%5E2%2Br%2B3%29+....group
5r%28%282r%5E3%2B6r%5E2%29%2B%28r%2B3%29%29+
5r%282r%5E2%28r%2B3%29%2B%28r%2B3%29%29+
5r%28r%2B3%29%282r%5E2%2B1%29