If one root of the equation x2 + ax + 3 = 0 is 1, then its other root – InterviewSolution

InterviewSolution

1.

If one root of the equation x2 + ax + 3 = 0 is 1, then its other root is A. 3 B. – 3 C. 2 D. – 2

Answer»

Let the given equation has roots α and β

α = 1

Here a = 1, b = a and c = 3

Sum of the roots

α + β = – b/a = – a

product of the roots

α β = c/a = 3

1 β = 3

β = 3

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