SOLUTION: I need help to figure out how to solve this problem: 5d^3 - 60d^2 +135d Thank you.

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Question 601300: I need help to figure out how to solve this problem:

5d^3 - 60d^2 +135d

Thank you.
Answer by flame8855(424) About Me  (Show Source):
You can put this solution on YOUR website!
5d^3 - 60d^2 +135d
5d(d^2-12d+27)
5d(d-3)(d-9)
solve for function =0
5d = 0 , d=0
d-3 = 0
d=3
d-9 = 0
d= 9