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Q.

The number of integral solutions of x2+9<(x+3)2<8x+25 is 

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answer is 5.

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Detailed Solution

The given inequality is x2+9<(x+3)2<8x+25

it implies that x2+9<x2+6x+96x>0x>0

and 

    x2+6x+9<8x+25x2-2x+1<17x-12<17x1-17,1+17

Hence the positive integral values of x are x=1,2,3,4,5

Therefore, the number of values of x is 5

 

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The number of integral solutions of x2+9<(x+3)2<8x+25 is