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Your description is ambiguous.
Did you mean √(x+3) = 12 OR (√x) + 3 = 12.
I'll work both, just so you can see the difference.
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√(x+3) = 12
Square both sides.
x+3 = 144
x = 141
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√x + 3 = 12
√x = 9
x = 81
Your description is ambiguous.
Did you mean √(x+3) = 12 OR (√x) + 3 = 12.
I'll work both, just so you can see the difference.
---
√(x+3) = 12
Square both sides.
x+3 = 144
x = 141
---
√x + 3 = 12
√x = 9
x = 81
-
X = 9