can anyone please help me find the answer to the following problem:

what is 8x-32 factored completely?

Printable View

- Sep 15th 2008, 06:08 PMyellowjellowhat is 8x-32 factored completely?
can anyone please help me find the answer to the following problem:

what is 8x-32 factored completely? - Sep 15th 2008, 06:09 PMJhevon
- Sep 15th 2008, 06:42 PMJhevon
*gasp* you mean you double posted?? :eek:

that was very naughty of you, yellow! that's even more against the rules than not posting new questions in a new thread

Quote:

you multiply the bottom so do you multiply the top?

you would get 5/24 is that right? or do i have to do more?

$\displaystyle \frac ab \times \frac cd = \frac {ac}{bd}$

please, NEVER make the mistake and think $\displaystyle \frac ab + \frac cd = \frac {a + c}{b + d}$. that is wrong - Sep 15th 2008, 06:49 PMyellowjello
so I'm right, the answer is 5/24

Correct? - Sep 15th 2008, 06:50 PMJhevon
- Sep 15th 2008, 07:11 PMJhevon
ok, why go through all the trouble of turning 5/6 into 20/24 only to simplify it to 5/6 again? aren't you just going in circles? there is a reason for writing it as 20/24, we don't want to go back to 5/6. don't forget your objective. you want 5/6 + 1/4, you are not dealing with 5/6 alone, you are adding something to it. if you make the manipulations i told you, you end up with

5/6 + 1/4 = 20/24 + 6/24 = ........? - Sep 15th 2008, 07:27 PMyellowjelloanswer
26/24 or 13/12 right?

- Sep 15th 2008, 07:29 PMJhevon
- Sep 15th 2008, 07:33 PMyellowjelloanswer expl
so you cross multiply 5*4 & 6*1 and multiply the denominators 24 underneath each of those numerators to get 20/24 + 6/24 then add them to get 26/24 and simplify to get 13/12

- Sep 15th 2008, 07:40 PMJhevon
- Sep 15th 2008, 07:47 PMyellowjelloanswer to your problem
okay

3/10 right? - Sep 15th 2008, 07:52 PMJhevon
- Sep 16th 2008, 09:15 AMmasters
- Sep 16th 2008, 05:33 PMJhevon