The week in math we learned about at new way to solve quadratic equation using the quadratic formula which is a formula that uses the a quadratic equation in standard form and is important inorder to quickly determine wether a quadratic equation is solveable and can be in some situations a faster method in solving than the box method inspection or perfect square. I choose this topic because my physics teacher talked about using it in my kinematics units and it sounded interesting.
To use the quadratic equation , follow these steps:
1. Identify the coefficients: Determine the values of in the quadratic equation.
2. Plug into the quadratic formula: Substitute the coefficients into the quadratic formula:
This formula gives you the solutions (roots) for the quadratic equation.
3. Calculate the discriminant: Compute , which determines the nature of the roots:
– If , there are two distinct real roots.
– If , there is one real root.
– If , there are two non-real roots.
Example:
Suppose we have the quadratic equation we dont have to change anyting since the coefficient for the high power is positive and all the terms are on one side .
1. Identify .
2. Plug into the quadratic formula:
Simplify to get:
So, the solutions are and .
3. Calculate the discriminant:
Since the discriminant is positive, there are two distinct real roots.
Therefore, the solutions to the quadratic equation are and .