The discriminant of a quadratic equation determines the nature of the roots of the equation whether they are rel or imaginary. The formula for determining the discriminant is
d = b2 - 4acwhen there are two identical real roots, then the discriminant is equal to zero. The answer is C.
No, 20 divided by 4 is just 5
X^2(x+2)-4(x+2)
(x^2-4) (x+2) = 0
do you have to keep going/?
or thats all they want?
