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8-Gravel
Feb 2, 2026 6:36 AM UTC
Question

Linear Equation an Polynomial

Hi everyone,
I’m trying to determine whether Mathcad Prime can symbolically or numerically solve:

• a single 3rd-order (cubic) polynomial, 
• a simple system of four linear equations with four unknowns.

Are there built-in functions or recommended workflows for this in Mathcad Prime,  Any examples or best practices would be appreciated.

Thanks!

2 replies

23-Emerald V
Feb 2, 2026 10:12 AM UTC

Numerically should be no problem. For the cubic solution use the root() function or a solve block.

For a set of equations use lsolve() or a solve block.

Symbolically try this:

LucMeekes_0-1770026780780.png

(That is: 

LucMeekes_2-1770029667381.png

)

and this:

LucMeekes_1-1770029558455.png

(That is: 

LucMeekes_3-1770029700619.png

)

But you may get the trouble indicated here:

https://community.ptc.com/t5/Mathcad/The-symbolic-result-returned-is-too-large-to-display/m-p/750983 

 

Success!
Luc

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ttokoro
21-Topaz I
Feb 2, 2026 10:46 AM UTC

image.pngimage.pngimage.png

image.png

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t.t.