Week 7 in Precalc 11 – The Quadratic formula

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 equation, follow these steps:

1. Identify the coefficients: Determine the values of equation in the quadratic equation.

2. Plug into the quadratic formula: Substitute the coefficients into the quadratic formula:
equation
This formula gives you the solutions (roots) for the quadratic equation.

3. Calculate the discriminant: Compute equation, which determines the nature of the roots:
– If equation, there are two distinct real roots.
– If equation, there is one real root.
– If equation, there are two non-real roots.

The Quadratic Formula | ChiliMath

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Example:
Suppose we have the quadratic equation 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 equation.
2. Plug into the quadratic formula:
equation
Simplify to get:
equation
equation
equation
So, the solutions are equation and equation .

3. Calculate the discriminant:
equation
Since the discriminant is positive, there are two distinct real roots.

Therefore, the solutions to the quadratic equation equation are equation and equation.

 

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