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A man’s age after 15 years will be the square of his age 15 years ago. What is his present age? |
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Answer» Let x be the age x + 15 = (x - 15)2 x + 15 = x2 - 30x + 225 x2 - 31x + 210 = 0 \(x=\frac{31\pm\sqrt{11}}{2}\) x = 21, 10 ∴ age x = 21 |
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