• Apr 28th 2010, 04:57 PM
evilexe
Hey guys, I got this problem on my math sheet and I have no idea if I did it right because it's the first time I see something with a division and two multiplications.

http://i41.tinypic.com/263k56f.jpg

Thanks,
EE
• Apr 28th 2010, 05:13 PM
skeeter
$\displaystyle \frac{a}{b} \div \frac{c}{d} \ne \frac{b}{a} \times \frac{c}{d}$

$\displaystyle \frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}$
• Apr 28th 2010, 05:51 PM
evilexe
That's what I thought after I finished.. Thanks :)
• Apr 28th 2010, 05:53 PM
evilexe
Do I have to flip the last two? Or just the middle one? I am now confused (Thinking)
• Apr 28th 2010, 06:37 PM
skeeter
Quote:

Originally Posted by evilexe
Do I have to flip the last two? Or just the middle one? I am now confused (Thinking)

you only "flip" for division ... just the middle one.
• Apr 29th 2010, 05:46 PM
evilexe
Hey, thanks for the reply. I did that yesterday and I think I got it right.
• Apr 29th 2010, 06:21 PM
shenanigans87
The answer you put is incorrect. It is the reciprocal of that.

[Math]\frac{(2w-3)(2w+3)^2}{6}[/tex]

You can test any simplification or expansion/contraction problem by assigning the variable an arbitrary value, then solve for the original equation and then your result.