This week in Precalc 11, in addition to reviewing our past units, we learned about the Quadratic formula. The quadratic formula allows us to solve any quadratic equation that’s in the form ax^2 + bx + c = 0. This is useful because you can use this formula anytime you don’t want to do grouping, inspection, etc.

In an equation, this is where the ABCs are:

To solve an equation you simply plug in the numbers and solve:

In the end, if you are left with a radical that can be simplified, make sure to simplify. Then you work out the equations till you get your answers.

In this example I have simplified the radical to a mixed radical, the index, the denominator and the constant can all be simplified so we simplify.