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Twenty one times of a positive number is less than its square by 100 |
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Answer» Answer: Step-by-step explanation: 21x - x^2 = 100 x^2 -21x +100 = 0 x^2-25x+4x+100 = 0 x(x-25)+4(x+25) = 0 (x-25)(x+25)(x+4) = 0 x = 25 , -25 , -4 |
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