Mathematics
If the roots of the quadratic equation, ax2 + bx + c = 0, a 0 are real and equal, then each root is equal to: 1. -a/2b 2. -b/2a 3. -2a/b 4. -c/2a
Related Questions
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
If the discriminant of the quadratic equation, ax2 + bx + c = 0, a ≠ 0 is greater than zero and a perfect square and a, b, c are rational, then the roots are:
rational and equal
irrational and unequal
irrational and equal
rational and unequal
If the discriminant of a quadratic equation, ax2 + bx + c = 0, is greater than zero and a perfect square and b is irrational, then the roots are:
irrational and unequal
irrational and equal
rational and unequal
rational and equal