Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#1 2013-02-10 05:01:58
- cooljackiec
- Member
- Registered: 2012-12-13
- Posts: 186
x =
Find all real values of x that satisfy the equation (x^2-82)^2 = 324
Last edited by bobbym (2013-02-10 06:04:17)
I see you have graph paper.
You must be plotting something
Offline
#2 2013-02-10 05:55:53
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: x =
Hi;
x = 10, x = 8, x = -8, x = -10
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#3 2013-02-10 07:59:25
- cooljackiec
- Member
- Registered: 2012-12-13
- Posts: 186
Re: x =
help me on another one
\frac{c}{c-5}=\frac{4}{c-4}
FInd c.
Also, the LaTeX doesn't seem to work..
I see you have graph paper.
You must be plotting something
Offline
#4 2013-02-10 08:02:06
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: x =
Hi;
Latex is out temporarily.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#5 2013-02-10 17:49:24
- Sabbir
- Guest
Re: x =
If you cross multiply,then you'd get c^2-4c=4c-20 which is c^2-8c+20=0,now you just have to find the polynomial's roots.
#6 2013-02-10 23:20:14
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: x =
Hi;
I am getting
c = 4 - 2 i and c = 4 + 2 i
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline