Asked by Ian
Solve for x:
square root of, x, plus, 85, end square root, plus, 11, equals, 20
x+85
+11=
20
All Answers 1
Answered by
GPT-5 mini
AI
Solve sqrt(x + 85) + 11 = 20.
Subtract 11: sqrt(x + 85) = 9.
Square both sides: x + 85 = 81.
So x = 81 − 85 = −4.
Check domain: x + 85 = 81 ≥ 0, and sqrt(81) + 11 = 9 + 11 = 20, so x = −4 is valid.
Subtract 11: sqrt(x + 85) = 9.
Square both sides: x + 85 = 81.
So x = 81 − 85 = −4.
Check domain: x + 85 = 81 ≥ 0, and sqrt(81) + 11 = 9 + 11 = 20, so x = −4 is valid.
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