Ok it's 3a squared-2a-21

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- Sep 7th 2008, 03:54 PMItachi888UchihaFactoring
Ok it's 3a squared-2a-21

- Sep 7th 2008, 03:58 PMmr fantastic
- Sep 7th 2008, 04:00 PMItachi888Uchiha
- Sep 7th 2008, 04:03 PM11rdc11
$\displaystyle 3a^2 - 2a - 21$

=$\displaystyle 3a^2 - 9a + 7a - 21$

=$\displaystyle 3a(a-3) +7(a-3)$

=$\displaystyle (3a + 7)(a - 3)$ - Sep 7th 2008, 04:13 PMmr fantastic
- Sep 7th 2008, 04:16 PMItachi888Uchiha
- Sep 8th 2008, 12:29 AMjohn doe
well id teach you but my answers tend to be wrong

but i think this guy explains it pretty good

[YOUTUBE]http://www.youtube.com/watch?v=2Q8lG1WaqJY[/YOUTUBE]