SOLUTION: I have to solve for z I have tried to figure this out and can't. Please help me 3+√(z-11) = √(z+4)

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Question 628270: I have to solve for z
I have tried to figure this out and can't.
Please help me
3+√(z-11) = √(z+4)
Answer by Alan3354(30983) About Me  (Show Source):
You can put this solution on YOUR website!
3+√(z-11) = √(z+4)
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3+%2B+sqrt%28z-11%29+=+sqrt%28z%2B4%29
Square both sides
9+%2B+6sqrt%28z-11%29+%2B+%28z-11%29+=+z%2B4
6sqrt%28z-11%29+=+6
Square again
36(z-11) = 36
x-11 = 1
z = 12