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Question

Find Value of K so that equation(x22x)2(x22x)+(k+2)=0 has four real solution

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Solution

given equation is
(x22x)2(x22x)+(k+2)=0---------------------(1)

putx22x=y------------------------------(2)

theneqn(1)willbe

y2y+(k+2)=0------------------------(3)

eqn(1) have is real solution this means eqn(2) & (3) both have two real solution.

i.e., D=b24ac>0

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