解非线性方程组：2个变量

GeoGebra 命令及参数

1. Element(lP, i) → P_i
2. Point(Segment[Px2, Px1]) → Ax
3. Point(Segment[Py2, Py1]) → Ay
4. If(Funktion ≟ 1, a(x, y), If[Funktion ≟ 2, b(x, y), (a(x, y) * b(x, y))]) → f00
5. If(((f1(x0 - ε / 2) * f1(x0 + ε / 2)) < 1.0E-8) ∧ ((f2(x0 - ε / 2) * f2(x0 + ε / 2)) < 1.0E-8), (x0, y0)) → E0x
6. If(((g1(y0 - ε / 2) * g1(y0 + ε / 2)) < 0) ∧ ((g2(y0 - ε / 2) * g2(y0 + ε / 2)) < 0), (x0, y0)) → E0y
7. Textfield(a) → inputBox1
8. Textfield(b) → inputBox2
9. Polygon((x_{max}, y_{max}), (x_{min}, y_{max}), (x_{min}, y_{min}), (x_{max}, y_{min})) → VV, d, e, g, h
10. Textfield(N_P) → Textfeld1
11. If(a_1, N_P, 2) → N_1
12. Sequence(x_{min} + ((x_{max} - x_{min}) / N_1 * i), i, 0, N_1) → xx
13. Sequence(y_{min} + ((y_{max} - y_{min}) / N_1 * i), i, 0, N_1) → yy
14. RemoveUndefined(Join[Zip[Mirror[{Roots[f00(a, x), y_{min}, y_{max}]}, y = x] + (a, 0), a, xx]]) → Pxxy
15. Join(Zip[Reverse[{Roots[f00(x, b), x_{min}, x_{max}]}] + (0, b), b, yy]) → Pyyx
16. Textfield(Funktion) → Textfeld2
17. Textfield(x_{min}) → Textfeld3
18. Textfield(y_{min}) → Textfeld4
19. Textfield(x_{max}) → Textfeld5
20. Textfield(y_{max}) → Textfeld6
21. Text(Element[L, 1]) → Lx
22. Text(Element[L, 2]) → Ly
23. Intersect(Element[L, 1], Element[L, 2]) → C
24. Zip((a(x(pp), y(pp)), b(x(pp), y(pp))), pp, lP) → Liste1