[CRASH] plotfunc() fails

[alexzkter]

I'm trying to get all answers from a Van Der Waals cubic equation.

Here's the definition of variables:

I defined 'x' too (x:=0)

When trying to plot the following equation on CAS, the hourglass stays there forever.


Which doesn't happen on it's equivalent form, the standard cubic form:




Anyway, I just managed to get all 3 answers from both forms of my equation.
There are 4 ways to solve the equation, by using the following sintaxis:

• With solve
  solve(equation,var)
  solve({equation},{var}) For multiple equations.
  

• With fsolve
  fsolve(equation,var)
  fsolve([equation],[var])--> For multiple equations, but this one only shows 1 result in my case.