Hello!

I would like to know if there is a formula resolving simplified, when a cubic equation is in the form

a * x^3 + b * x^2 + c * x + d = 0

with a = c and b = d ...

Help me, please!

## Mathematics

### a cubic simplified

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**1**of**1**• [ 4 posts ]### a cubic simplified

by » Fri Mar 09, 2012 6:48 pm- scifo
**Posts:**13**Joined:**Wed Aug 25, 2010 2:25 pm

### Re: a cubic simplified

by » Mon Mar 12, 2012 9:35 pmscifo,

Try inputting your problem into W|A just the way you typed it above.

"a * x^3 + b * x^2 + c * x + d = 0 with a = c and b = d"

http://www.wolframalpha.com/input/?i=a+ ... nd+b+%3D+d

The result you get is a more simplified "(x^2+1) (c x+d) = 0" and you also get solutions for the variable x.

Hope that helps!

Try inputting your problem into W|A just the way you typed it above.

"a * x^3 + b * x^2 + c * x + d = 0 with a = c and b = d"

http://www.wolframalpha.com/input/?i=a+ ... nd+b+%3D+d

The result you get is a more simplified "(x^2+1) (c x+d) = 0" and you also get solutions for the variable x.

Hope that helps!

- WolframAlphaMathHelp
**Posts:**190**Joined:**Fri Oct 28, 2011 5:00 pm

### Re: a cubic simplified

by » Tue Mar 13, 2012 9:13 amI thank you very much for your informations, that I have been very useful ....

I wanted to know if with this use of WA i can see if any algebraic

equation is irreducble or not, without resorting to the infamous theory of elimination...

It is true?

Let me know, please!

I wanted to know if with this use of WA i can see if any algebraic

equation is irreducble or not, without resorting to the infamous theory of elimination...

It is true?

Let me know, please!

- scifo
**Posts:**13**Joined:**Wed Aug 25, 2010 2:25 pm

### Re: a cubic simplified

by » Tue Mar 13, 2012 2:12 pmscifo,

It is unclear to me exactly what you are looking for, but perhaps the cubic formula will satisfy your curiosity.

http://www.wolframalpha.com/input/?i=cubic+formula

You can use this to solve any cubic equation.

In general, if you input any equation into W|A it will tell you if there are any solutions and solve them if possible.

It is unclear to me exactly what you are looking for, but perhaps the cubic formula will satisfy your curiosity.

http://www.wolframalpha.com/input/?i=cubic+formula

You can use this to solve any cubic equation.

In general, if you input any equation into W|A it will tell you if there are any solutions and solve them if possible.

- WolframAlphaMathHelp
**Posts:**190**Joined:**Fri Oct 28, 2011 5:00 pm

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