Question

What is the discriminant of the quadratic equation 0 = –x^2 + 4x – 2?

–4

8

12

24

Answer 1

from this equation :
a: the coefficient of x^2 & b: the coefficient of x & c: the last term
so a=-1 ; b=4 ; c=-2;
discriminant = b^2 -4*a*c
= (4)^2 -4(-1)(-2)
= 8