Factoring

**lovestarwarz** · January 19th 2011, 05:42 PM

I kinda need help with this.

x^2 + 3x+ 2

ax^2 - 9ax + 18a

**dwsmith** · January 19th 2011, 05:47 PM

Originally Posted by lovestarwarz

I kinda need help with this.

x^2 + 3x+ 2

ax^2 - 9ax + 18a

$(x\pm\alpha)(x\pm\beta)$

$\alpha\cdot\beta=2$

$\alpha +\beta=3$

**Prove It** · January 19th 2011, 05:49 PM

For the second, take out a common factor of $\displaystyle a$ first, then use the method dwsmith suggested.

**pickslides** · January 19th 2011, 05:50 PM

Originally Posted by lovestarwarz

x^2 + 3x+ 2

is (x+a)(x+b) where a+b=3 and ab=2

Originally Posted by lovestarwarz

ax^2 - 9ax + 18a

Same goes here, just factor out 'a' first.

**lovestarwarz** · January 19th 2011, 05:53 PM

Mmk (:

Thread: Factoring