The-roots-of-x-2-a-1-x-b-2-0-are-equal-Then-which-of-the-following-can-be-the-values-of-a-and-b-

Question Number 27397 by julli deswal last updated on 06/Jan/18

The roots of x^{2} - (a + 1) x + b^{2} = 0 are

equal . Then which of the following

can be the values of a and b .

Answered by jota@ last updated on 06/Jan/18

a = 1 a n d b = 1

Answered by mrW1 last updated on 06/Jan/18

Δ = {(a + 1)}^{2} - 4 b^{2} = 0

\Rightarrow a + 1 = \pm 2 b

\Rightarrow a = \pm 2 b - 1

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