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November 20, 2014

November 20, 2014

Posted by **Greg** on Monday, January 19, 2009 at 6:58pm.

- Math-Factoring -
**Reiny**, Monday, January 19, 2009 at 7:14pmfirst of all I see a common factor of 5x^2

so

5x^4-180x^2

= 5x^2(x^2 - 36)

Now isn't that a difference of squares???

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