How do I assign solutions of an equation to a variable?

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david8381
23 ●4 ●5 ●8

a = solve(1-z-z^2==0,z)[0] has the result of a being 'z=-1/2*sqrt(5)-1/2'

But I would like to have just a = '-1/2*sqrt(5)-1/2'

How do I convert the expression to a number?

Thanks!

1 Answer

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You can use the method .rhs() or .right_hand_side() as follows:

sage: a = solve(1-z-z^2==0,z)[0].rhs()
sage: a
-1/2*sqrt(5) - 1/2

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Asked: 11 years ago

Seen: 531 times

Last updated: Oct 02 '13