SOLUTION: 3√ z+4=z-6

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Question 937153: 3√ z+4=z-6
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
3sqrt%28z%2B4%29=z-6
9%28z%2B4%29=%28z-6%29%5E2
9z%2B36=z%5E2-12z%2B36
z%5E2-21z=0
z%28z-21%29=0
Two solutions:
z=0
and
z-21=0
z=21
Verify the solutions:
3sqrt%280%2B4%29=0-6
3sqrt%284%29=-6
6=-6
False, not a real solution.
3sqrt%2821%2B4%29=21-6
3sqrt%2825%29=15
3%2A5=15
15=15
True
highlight%28z=21%29