Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#26 2014-10-27 19:41:55

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

No.


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#27 2014-10-27 20:04:09

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

What is 1*x^2 = ?


'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

#28 2014-10-27 20:06:04

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

x^2


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#29 2014-10-27 20:07:48

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

Can we say that the coefficient of x^2 in x^2 is 1, then?

Last edited by Agnishom (2014-10-27 20:08:07)


'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

#30 2014-10-27 20:08:19

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

Yes.


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#31 2014-10-27 20:10:53

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

Agnishom wrote:

Well, it is.

Is x^2+5x+6 of that form?


Compare x^2+5x+6 with the ax^2 + bx + c form?

What is the value of a, b and c in this case?


'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

#32 2014-10-27 20:22:48

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

a = 1, b  = 5, c = 6


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#33 2014-10-27 20:26:00

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

Agnishom wrote:

Okay let me write down the formula here!


What is the value of a,b and c in this equation: x^2 +5x+6 =0?

Now plug the values in these two formulae and simplify.


'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

#34 2014-10-27 20:31:43

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

Show me


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#35 2014-10-27 20:34:45

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

Use the two formulae and substitute a=1, b=5, c =6 in them


'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

#36 2014-10-27 20:39:11

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

Got -2 and -3?


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#37 2014-10-27 20:42:19

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

That is very good!

Please try solving the same equation as taught in school by hand. Do your answers match?


'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

#38 2014-10-27 20:45:49

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

I don't know how to solve it...


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#39 2014-10-27 20:50:14

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

How do you do it in school then?


'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

#40 2014-10-27 21:20:34

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,118

Re: Quadratic Equations

I don't know, maybe you could show me.


I wish I was in Dixie, Hooray! Hooray!...
"Non tutte le ciambelle riescono col buco.”

Offline

#41 2014-10-28 00:26:47

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,716
Website

Re: Quadratic Equations

One way to solve a quadratic equation is to use the formulae I gave you.

Can you middle-term factorise a quadratic polynomial?


'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

#42 2016-12-03 22:22:33

iamaditya
Member
From: Planet Mars
Registered: 2016-11-15
Posts: 533

Re: Quadratic Equations

David, I recommend you to read every topic on quadratic equations from mathisfun.com. I see you don't know about it. It is very much required in mathematics. Please do it quickly.


Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

Offline

Board footer

Powered by FluxBB