if x= √p+q + √p-q/√p+q - √p-q, the find the value of qx^2-2px+q
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x= √p+q + √p-q / √p+q - √p-q
on rationalizing ,
x= 2p + √p²-q²/ 2q = p+ √p²-q² / q
= xq-p = √p²-q²
on squaring,
q²x² + p² - 2qxp = p²-q²
= q²x² - 2p+ q² = 0
= q (qx²-2px + q)
therefore answer =0
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