Compare your answers.

Graph the quadratic functions corresponding to the following equations and determine the roots of the equations, using technology.


1.

Graph using technology and then find the x-intercepts.

The x-intercepts are x = 0 and x = 3 , and therefore the roots of the equation are also x = 0 and x = 3 .

2.

Rearrange the question .

Graph the function using technology and then find the x-intercepts.

The x-intercepts are x = −3 and , and therefore the roots of the equation are also x = −3 and .


Quadratic equations can be solved in a variety of ways. You have seen how to solve them by inspecting graphs, factoring, using the quadratic formula and using technology. In the next Lesson you will put these skills to use as you solve even more problems modeled by quadratic functions.