Question 131278
x=(-b+-sqrt(b^2-4ac))/2a __ this is the quadratic formula for finding the roots


notice that the discriminant is the quantity which has the square root taken


if the discriminant is a positive perfect square, then the roots are rational numbers


if the discriminant is positive (but not a perfect square), the roots are irrational


if the discriminant is zero, then the roots are equal


if the discriminant is negative, the roots are imaginary (not real)