JEE MATHEMATICS MCQ: QUADRATIC EQUATIONS

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Analyzing +4 | -1

If one of the roots of the equation

x^2+a x+b=0

and

x^2+

b x+a=0

is coincident. Then the numerical value of

(a+b)

is:

View answer and explanation

Correct option: B

-1

Option B (-1) is correct because by equating the coincident root in both equations, we can derive that a+b = -1.

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9{x^2} - 18\left| x \right| + 5 = 0

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