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Q: Use the quadratic equation y equals x2 plus 3x plus 9 Calculate the discriminant to determine the number of real roots?

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Whether or not that there is a solution to a quadratic equation,

A quadratic equation has one discriminant.

If the discriminant of a quadratic equation is less then 0 then it will have no real solutions.

b2-4ac is the discriminant of a quadratic equation.

If the discriminant of the quadratic equation is zero then it will have 2 equal roots. If the discriminant of the quadratic equation is greater than zero then it will have 2 different roots. If the discriminant of the quadratic equation is less than zero then it will have no roots.

If the discriminant of a quadratic equation is zero then it has two identical roots.

Rational.

The discriminant

The discriminant of the quadratic equation: y = ax^2 + bx + c is b^2 - 4ac

It can tell you three things about the quadratic equation:- 1. That the equation has 2 equal roots when the discriminant is equal to zero. 2. That the equation has 2 distinctive roots when the discriminant is greater than zero. £. That the equation has no real roots when the discriminant is less than zero.

That the discriminant of the quadratic equation must be greater or equal to zero for it to have solutions. If the discriminant is less than zero then the quadratic equation will have no solutions.

The discriminant is -439 and so there are no real solutions.

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