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Say we have an equation like y = x2 + 3x + 2. We can graph this just like we'd graph a line. How could you figure out the points where the graph crosses the x-axis?

- Ms. Bev
**Posts:**2**Joined:**Sat Jan 29, 2011 9:55 pm

To find out where the graph crosses the x axis you must find those values of x that, when put into the equation, make y equal to zero.

This can be done by factoring the quadratic expression. Learn how here.

SD

This can be done by factoring the quadratic expression. Learn how here.

SD

- snowdrifter
**Posts:**18**Joined:**Tue Jan 11, 2011 4:52 pm

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