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February 1, 2015

February 1, 2015

Posted by **troy** on Tuesday, June 8, 2010 at 12:09am.

√x+3 * √x-3

- radicals -
**Reiny**, Tuesday, June 8, 2010 at 6:34amwe know √a * √b = √(ab)

so √(x+3) * √(x-3)

= √[(x+3)(x-3)]

=√(x^2 - 9)

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