Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
Pages: 1
#1 2014-08-05 06:52:48
- PatternMan
- Member
- Registered: 2014-03-08
- Posts: 199
Linear equation?
So an equation with two terms is a binomial right? An equation with degree ^1 is a linear equation. Ax + By = C is the general form of a linear equation with two variables that we graph. The book I'm reading says that -2y = 5 is a linear equation with two variables. Why is this? There is 0x there.
"School conditions you to reject your own judgement and experiences. The facts are in the textbook. Memorize and follow the rules. What they don't tell you is the people that discovered the facts and wrote the textbooks are people like you and me."
Offline
#3 2014-08-05 07:02:57
- Whizzies
- Member
- Registered: 2014-07-18
- Posts: 53
Re: Linear equation?
The book is wrong.
Hehe, explain why the book is wrong.
Offline
#4 2014-08-05 09:01:07
- PatternMan
- Member
- Registered: 2014-03-08
- Posts: 199
Re: Linear equation?
book says it's written in the form Ax + By = C. A=0. B= -2, C = 5
So
0(x) + (-2)y = 5
"School conditions you to reject your own judgement and experiences. The facts are in the textbook. Memorize and follow the rules. What they don't tell you is the people that discovered the facts and wrote the textbooks are people like you and me."
Offline
#5 2014-08-05 11:09:10
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Linear equation?
What book is that?
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
#6 2014-08-05 12:30:48
- ShivamS
- Member
- Registered: 2011-02-07
- Posts: 3,648
Re: Linear equation?
The book is wrong.
With that perspective, I can say y = 5 is an equation of infinite variables e.g. 0x, 0m, 0n, 0p etc.
Offline
#7 2014-08-05 12:33:55
Re: Linear equation?
Definiton: A variable is said to be there if its highest power in the equation is not zero.
Also, the degree of the zero polynomial is undefined.
You however *can* consider it an equation in 2 variables, because you can plot it on the cartesian plane
Last edited by Agnishom (2014-08-05 12:34:12)
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
Offline
#8 2014-08-05 13:08:20
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Linear equation?
Using that idea we can say that x^2 + 5x -10 = 0 is a 200th degree polynomial equation because all the other powers have 0 coefficients.
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
#9 2014-08-06 00:24:02
Re: Linear equation?
You can call it anything you like. Does the name matter?
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
Offline
#10 2014-08-06 02:36:11
- PatternMan
- Member
- Registered: 2014-03-08
- Posts: 199
Re: Linear equation?
What book is that?
elementary and intermediate Algebra - Michael Sulivan,
"School conditions you to reject your own judgement and experiences. The facts are in the textbook. Memorize and follow the rules. What they don't tell you is the people that discovered the facts and wrote the textbooks are people like you and me."
Offline
#11 2014-08-06 23:44:38
- ShivamS
- Member
- Registered: 2011-02-07
- Posts: 3,648
Re: Linear equation?
He says it's bivariate because he's thinking of it from a graphing perspective.
Offline
#12 2014-08-06 23:45:33
Re: Linear equation?
That is what I was telling. 
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
Offline
Pages: 1