配方法求解二次方程

GeoGebra 命令及参数

1. Ray(D, D_{b}) → n
2. OrthogonalLine(DIAG, n) → p
3. Intersect(n, p) → H
4. Polygon(A, B, C, D) → c1, a, b_1, c_2, d_3
5. Polygon(C, C_{b}, D_{b}, D) → c2, c_1, c_{b}, d_{b}, d_1
6. Polygon(A, D, D_{bvert}, A_{b}) → c3, a_1, d_2, d_{bvert}, a_{b}
7. Polygon(D_{b}, D, 4) → polígono1, f, g, h, i, E, F
8. Point(yAxis) → G
9. Ray(D, D_{bvert}) → r
10. OrthogonalLine(CS, yAxis) → j
11. OrthogonalLine(CH, xAxis) → k
12. Polygon(CHR', CHR, CH, H) → c5, s, t, f_1, g_1
13. Polygon(CS, CSR, CSR', D) → c4, cs, csr, csr', d_4
14. Ray(D, AUX) → l
15. OrthogonalLine(DIAG, r) → q
16. Intersect(r, q) → J
17. Polygon(J, DIAG, H, D) → c6, j_1, diag, h_1, d_6