On Thu, 1 Apr 2021 at 15:43, 'B A' via sympy <[email protected]> wrote:
>
> What is described above has worked well for me. But there is a further
> simplification step that I need help with.
>
> I have some long expressions containing terms contain terms which look like
> this example:
> sqrt(4*a**2 + 1)*sqrt(1/(4*a**6 - 15*a**4 + 12*a**2 + 4))
> How can I instruct sympy to combine such square roots and factor the
> arguments? In this example that would lead to:
>
> sqrt(factor((4*a**2 + 1)/(4*a**6 - 15*a**4 + 12*a**2 + 4)))
> =
> 1/Abs(a**2 - 2)
You can declare a to be real:
In [12]: a = Symbol('a', real=True)
In [13]: expr = sqrt(factor((4*a**2 + 1)/(4*a**6 - 15*a**4 + 12*a**2 + 4)))
In [14]: expr
Out[14]:
1
────────
│ 2 │
│a - 2│
Oscar
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