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Solving Quadratic Equations using the Quadratic Formula

Solving Quadratic Equations using the Quadratic Formula 1.17 - Solution

arrow_back Return to Solving Quadratic Equations using the Quadratic Formula
In the Quadratic Formula, is the discriminant. Since the given equation is already in standard form, we can identify the values of and Now, let's evaluate the discriminant.
The discriminant is

We want to use the discriminant of the given quadratic equation to determine the number and type of the roots. If we don't want to know the exact values of the roots, we only need to work with the discriminant. From Part A, we know that the discriminant of the given equation is Since the discriminant is greater than zero and a perfect square, the quadratic equation has two rational roots.

We will use the Quadratic Formula to find the exact solutions of the given equation. Recall that we have already identified the values of and in Part A, as well as the discriminant, Let's substitute these values into the Quadratic Formula.
The solutions for this equation are Let's separate them into the positive and negative cases.

Using the Quadratic Formula, we found that the solutions of the given equation are and