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vcbabu
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Yes if X is integer then X will be 12 and it would be C
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mdfrahim
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how do you guys calculated the value of X to be 12 ?
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superman
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Since the boundary values are squares of 10 and 11 and the equation is just x-20 less than x^2, I started plugging in numbers from 10 onwards and only 12 satisfies.

Other easier way was in the original equation start pugging in values starting starting from 10.

100<(x-5)(x+4)<121

If there is a better or easier way please let us know..



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