If a,b,c denote the sides of a ABC and the equations ax^2+bx+c=0 and x^2+ 2x+1=0 have a common root, then C=

JEE Main Mathematics question

If denote the sides of a and the equations and have a common root, then

Answer: (B)

The equation has discriminant , so its roots are non-real conjugates. A quadratic with real coefficients sharing one such root must

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Question ID VK-008508