Comment #3 on issue 3545 by [email protected]: solving a complicated
expression with square roots
http://code.google.com/p/sympy/issues/detail?id=3545
I'm not sure why unrad is not attempted, but if you use it you obtain:
eq
-sqrt((m - q)**2 + (-m/(2*q) + 1/2)**2) + sqrt((-m**2/2 - sqrt(4*m**4 -
4*m**2 + 8*m + 1)/4 - 1/4)**2 + (m**2/2 - m - sqrt(4*m**4 - 4*m**2 + 8*m +
1)/4 - 1/4)**2)
solve(unrad(eq)[0],q)
[0, m**2/2 - sqrt(4*m**4 - 4*m**2 + 8*m + 1)/4 - 1/4, m**2/2 + sqrt(4*m**4
- 4*m**2 + 8*m + 1)/4 - 1/4]
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