# Week 7- Using quadratic formula

This week, I have learned how to use quadratic formula and see if there is a solution to the question.

The equation

Using -b+/-$\sqrt{b^2-4ac}$

If there is a negative in the root sign, then the answer will not work.

Example -3+/- $\sqrt{2^2-4(1)(6)}$

-3+/- $\sqrt{4-24}$

-3+/-$\sqrt{-20}$

Since there is -20 in the square root, it is not possible. However, if the answer was positive, there will have a answer to the equation.

By doing this, you will not need to waste your time by finishing your equation then finding out that it doesn’t work. As a result, this little trick helped me to figure out if the equation works or not.