SOLUTION: How would I solve: U to the fifth power-13u cubed+36u-0

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Question 926703: How would I solve:
U to the fifth power-13u cubed+36u-0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
U%5E5-13U%5E3%2B36U=0
U%28U%5E4-13U%5E2%2B36%29=0
U%28U%5E2-9%29%28U%5E2-4%29=0
U%28U-3%29%28U%2B3%29%28U-2%29%28U%2B2%29=0
Five solutions:
U=0
.
.
U-3=0
U=3
.
.
U%2B3=0
U=-3
.
.
U-2=0
U=2
.
.
U%2B2=0
U=-2