On 2014-10-15, platane <guo...@gmail.com> wrote:

> solve does not solve ?
>
> sage: solve(-(1/2*sqrt((4*w+1)+1))*t+w==0,w)
> [w == 1/2*sqrt(4*w + 2)*t]

Well, if I'm not mistaken, Sage punts to Maxima's 'solve' function,
which, I'm sorry to report, is not very strong (it can solve a
relatively narrow range of problems). But I find that Maxima's
'to_poly_solve' can solve it. Maybe someone here can say how to
call it from Sage.

> In fact, the solution is: w=t+t^2

Are you sure? Assuming some value for t, plotting the expression
doesn't seem to show a solution at w = t + t^2.

best

Robert Dodier

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