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? Maxima doesn't seem to have a problem:
(%i2) E1 : x^2*D1^2+(y-y1)^2*C1^2 - C1^2*D1^2;
2 2 2 2 2 2
(%o2) - C1 D1 + x D1 + (y - y1) C1
(%i3) solve(E1 = 0, y);
2 2 2 2
sqrt(C1 - x ) D1 - y1 C1 sqrt(C1 - x ) D1 + y1 C1
(%o3) [y = - -------------------------, z = -------------------------]
C1 C1
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