Question

use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex.
2x2 + x - 1 = 0
4/3x2 - 2x + 3/4 = 0
2x2 + 5x + 5 = 0
3z2 + z - 1 = 0
m2 + m + 1 = 0

Answer 1

Discrimininant = b^-4ac!

Answer 2

which one?

Answer 3

everyone.

Answer 4

For a quadratic equation ax^2+bx+c=0
the discriminant is (b^2-4ac)
If the discriminant is greater than zero then the roots are real. If the less than zero than two complex roots. If equal to zero then 1 real root