Posted by **-Untamed-** on Tuesday, October 4, 2011 at 10:53pm.

5-3ã2 multiplied by its conjugate is...

Its supposed to be 7, but I don't get how to do this, cause now im totally confused, i thought that the conjugate came when you were to rationalize a denominator...

I did this...

15ã2-9ã4

15ã2-18

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