"Delta" represents the unary quadratic equation ax about x? The discriminant of the root of +bx+c=0, whose symbol is "△"

Only depends on the coefficients of a quadratic equation: △=b? -4ac

The value of △ determines the root of the unary quadratic equation;

When (1) △ > 0, the equation has two unequal real roots.

(2) When △ = 0, the equation has two equal real roots. At this time, ax? +bx+c is a completely flat way.

(3) When △ < 0, the equation has no real root.