If the equation x2 – bx + 1 = 0 does not possess real roots, then

If the equation does not possess real roots then

d = b2 – 4ac 0


Here a = 1, b = – b, c = 1


d = b2 – 4 < 0


b2 < 4


b < 2


– 2 < b < 2

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