Mathematics
The discriminant of the quadratic equation ax2 + bx + c = 0, a ≠ 0 is given by:
b2 - 2ac
b2 - ac
b2 - 4ac
none of these
Related Questions
If a, b, c are rational, prove that the roots of the equation (b - c)x2 + (c - a)x + (a - b) = 0 are also rational.
For real roots of a quadratic equation, the discriminant must be:
greater than or equal to zero
greater than zero
less than or equal to zero
less than zero
The roots of the quadratic equation px2 - qx + r = 0 are real and equal if :
(a) p2 = 4qr
(b) q2 = 4pr
(c) –q2 = 4pr
(d) p2 > 4qr