Homework Help: Algebra

Posted by Hazel on Thursday, October 6, 2011 at 9:28pm.

After solving a rational equation, why is it important to check your answer? How is this done? What happens if you are checking a solution for the rational expression and find that it makes one of the denominators in the expression equal to zero?

Algebra - Steve, Friday, October 7, 2011 at 5:57am
That's why you check. If a fraction has zero denominator, it is undefined.

If b = a/0
then b*0 = a

There is no number you can multiply by 0 to get a nonzero value.

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