2.1, 2.2

There are a couple ways to solve a quadratic.

Firstly, you can factorise. In order to factorise, you must:

1. write the equation in the form ax^2 + bc+c=0
2. factorise the left hand
3. set each factor equal to zero and to solve, find the values of x

Secondly, you can use the quadratic formula. The solutions of ax^2 + bc+c=0 can be found by using the formula:

Lastly, you can complete the square. You use the formula:

a quadratic expression in the form p(x + q)^2 +r, where p, q, and r are real constants is in the completed square form.