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x 2 -x-1 = 0 and x>0 then what is the value of x 2 +(1/x 2) =? a)3 b) (1+5+2*5 1/2 ) / 2(1+5 1/2 +2) c) 3+5 1/2 d) 6
x2- x – 1 =0dividing by x,x – 1 – 1/x =0x – 1/x = 1Squaring both sidesx2 + 1/x2 - 2 = 1x2 + 1/x2 = 3
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