Question

solve
1/2 * 10 * [√x^2 - 25] = 60
ans 13 . but how???

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Answer 1

Answer:

Step-by-step explanation:

1/2 * 10 * √(x² - 25) = 60

=> √(x² - 25) = 60 * 2 * 1/10

=> √(x² - 25) = 12

Squaring on both sides.

=> [√(x² - 25)]² = 12²

=> x² - 25 = 144

=> x² = 144 + 25 = 169

=> x = √169 = 13.