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Question

If p - √q = 1/( p + √q) , where p and q are positive rational numbers , then √(q - p2) is

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Solution

p-q=1p+qp-qp+q=1p2-q2=1p2-q=1-q+p2=1Mutipy by -1 both side we get, q-p2=-1q-p2=-1

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