Monday, October 1, 2012

Unit G Question 9


9) Describe how to find the x-intercepts of a rational function. Include both the long way and the shortcut way, explaining why the shortcut makes mathematical sense.

- To find the x-intercepts of a rational function you must first factor out the regular equation. After you will plug in zero for "y". For the long way you must multiply the equation by its denominator. This will eliminate the denominator so it will be easier to solve for zero. The shortcut is to just set the numerator equal to zero. This is because if you think about it eliminating the denominator will take more work if you already know that it will cancel.

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