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how to do quadratic formula and the discriminant. The notation used for the discriminant is D delta so we have D b 2 - 4 a c. Roots can occur in a parabola in 3 different ways as shown in the.
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In this tutorial get introduced to the discriminant of a quadratic equation. The real roots or the number of x-intercepts is easily shown with a quadratic equation. F o r m u l a Discriminant b 2 4 a c.
The first thing Ill do here is multiply through on the left-hand side and then Ill move the 4 over from the right-hand side to the left-hand side.
Then we plug these coefficients in the formula. The expression used to find the discriminant is the expression located under the radical in the quadratic formula. This formula is used to find out whether the roots of the quadratic equation are real or imaginary. This information is helpful because it serves as a double check when solving quadratic equations by any of the four methods factoring completing the square using square roots and using the quadratic.
