On Sun, May 4, 2008 at 7:32 PM, C Y wrote:
> I'm trying to solve for y. In Axiom:
>
> (1) -> E1 := x^2*D1^2+(y-y1)^2*C1^2 - C1^2*D1^2
> (1) ->
> 2 2 2 2 2 2 2 2 2
> (1) C1 y1 - 2C1 y y1 + C1 y + D1 x - C1 D1
> Type: Polynomial
> Integer
> (2) -> solve(E1=0,y)
> (2) ->
> 2 2 2 2 2 2 2 2 2
> (2) [C1 y1 - 2C1 y y1 + C1 y + D1 x - C1 D1 = 0]
> Type: List Equation Fraction Polynomial
> Integer
>
> Am I doing something wrong?
I guess you need to be a little more explicit about the variables:
(1) -> E1:MPOLY([x,y],EXPR INT) := x^2*D1^2+(y-y1)^2*C1^2 - C1^2*D1^2
2 2 2 2 2 2 2 2 2
(1) D1 x + C1 y - 2C1 y1 y + C1 y1 - C1 D1
Type: MultivariatePolynomial([x,y],Expression Integer)
(2) -> solve(E1=0,y)
+----------+ +----------+
| 2 2 | 2 2
D1\|- x + C1 + C1 y1 - D1\|- x + C1 + C1 y1
(2) [y= -----------------------,y= -------------------------]
C1 C1
Type: List Equation Expression Integer
(3) ->
Regards,
Bill Page.
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