Correct Answer: Option C

Explanation

x - 8\(\sqrt{x}\) + 15 = 0
x + 15 = 8\(\sqrt{x}\)

square both sides = (x + 15)² = (8 \(\sqrt{x}\)²

x² + 225 + 30x = 64x

x² + 225 + 30x - 64x = 0

x² - 34x + 225 = 0

(x - 9)(x - 25) = 0

x = 9 or 25

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