Question

If roots of a quadratic equation are equal then signs of b and c are??

Answer 1

Answer:

b=c

Step-by-step explanation:

ax^2 + bx + c < 0 when a < 0. Therefore, for all real values of x from the quadratic expression ax^2 + bx + c we get the same sign as a when the roots of ax^2 + bx + c = 0 (a ≠ 0) are imaginary. Notes: (i) When the discriminant b^2 - 4ac = 0 then the roots of the quadratic equation ax^2 + bx + c = 0 are equal.

other answer is:

When a, b, and c are real numbers, a ≠ 0 and the discriminant is zero, then the roots α and β of the quadratic equation ax2+ bx + c = 0 are real and equal.