Thank you for your response. I made a mistake, wanted (sqrt(x)+2)(sqrt(x)-1). But, in general, I've got the idea.
On Sunday, April 5, 2015 at 7:45:51 AM UTC+3, Ondřej Čertík wrote: > > On Sat, Apr 4, 2015 at 7:15 AM, Paul Royik <[email protected] > <javascript:>> wrote: > > Hwow can I make sympy factor x+sqrt(x)-2 into (sqrt(x)+1)(sqrt(x)-2) ? > > These two are not equal, are they? > > In [15]: (sqrt(x)+1)*(sqrt(x)-2) > Out[15]: (√x - 2)⋅(√x + 1) > > In [16]: expand(_) > Out[16]: -√x + x - 2 > > I think you got the minus wrong in the sqrt(x) term in x-sqrt(x)-2. > > Anyway, to factor it, I would do: > > In [1]: x = Symbol("x", positive=True) > > In [2]: e = x-sqrt(x)-2 > > In [3]: factor(e.subs(x, x**2)).subs(x, sqrt(x)) > Out[3]: (√x - 2)⋅(√x + 1) > > In [4]: e = x+sqrt(x)-2 > > In [5]: factor(e.subs(x, x**2)).subs(x, sqrt(x)) > Out[5]: (√x - 1)⋅(√x + 2) > > > Ondrej > > > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "sympy" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to [email protected] <javascript:>. > > To post to this group, send email to [email protected] > <javascript:>. > > Visit this group at http://groups.google.com/group/sympy. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/sympy/3ca41d24-8764-4f03-9a0a-d327893e15c7%40googlegroups.com. > > > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/fa9ee665-eac0-4be7-8b00-51faef0c8214%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
