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Answer:
x = √17 exact answer
x ≈ 4.12 decimal approximation
Step-by-step explanation:
a² + b² = c²
x² + 8² = 9²
x² + 64 = 81
x² = 17
Take the square root of both sides
x = √17 exact answer
x ≈ 4.12 decimal approximation