Posted by Sara on Friday, October 9, 2009 at 6:53pm.
Is the product of two irrational numbers always an irrational
number?

Math  Lisa, Friday, October 9, 2009 at 7:01pm
not neccessarily

Math  MathMate, Friday, October 9, 2009 at 8:32pm
When you have a statement like "...always...", it is sometimes (not always) easier to disprove with a counter example than to prove the truth of the statement.
For example,
√2 is irrational.
√2 * √2 = 2 is rational.
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