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Question

Solve :
x45x2+6=0

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Solution

Let x2=a
so, x45x2+6=0(x2)25(x2)+6=0a25a+6=0
a23a2a+6=0a(a3)2(a3)=0(a3)(a2)=0
Either a=3 or a=2 thus, x=3 or x=2

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