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September 15, 2014

September 15, 2014

Posted by **guadalupe** on Monday, January 3, 2011 at 6:16pm.

- algebra -
**Reiny**, Monday, January 3, 2011 at 6:20pm9x²-66x+21

always look for common factors first, thus resulting i smaller numbers

= 3(3x^2 - 22 + 7)

= 3(3x - 1)(x - 7)

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