If a² + b² = 145 and a = 9 then b equals?
- 8
- 9
- 10
- None of these
Explanation
Put a = 9 in a² + b² = 145
9² + b² = 145
81 + b² = 145
b² = 145 - 81
b² = 64
b = ±8
Last verified on 24-05-2026
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