4 years, 58 days

## converting a rational equation into a di...

Maple 2019

Hi,

I am trying to derive solutions for cubic equation using Maple.

Problem I encountered is it automatically cancles and simplifies, I cannot reach to the final form using Maple commands except modifying the equation by myself.

like,

(-108*q - 12*sqrt(12*p^3 + 81*q^2))^(1/3)/6 into (-q/2 + sqrt(p^3/27 + q^2/4))^(1/3)

Another one, even though I want this fractional form, it becomes other form automatically

(-q/2 + sqrt(p^3/27 + q^2/4))^(1/3) into (-q/2 + sqrt(12*p^3 + 81*q^2)/18)^(1/3)

Thank you.

## Can this be simplified from a given rule...

Maple 2016

Hello there,

I want to simplify this for a given rule in Maple

(-(1/2)*ib-(1/2)*ia+ic)*vc+(-(1/2)*ia-(1/2)*ic+ib)*vb+(-(1/2)*ic-(1/2)*ib+ia)*va

rule :  ia+ib+ic=0

A desired result should be

3/2*ic*vc+3/2*ib*vb+3/2*ia*va

but I can't apply this rule in Maple...  it seems like recursive and goes back again and again.

Can it break the recursive routine and make it as a desired result?

Thank you

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