Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版:英文原文完整保留,中文紧随对应单元;术语采用 v20260916 确认表,自动语义审校结果可追溯。

Quadratic Formula

二次公式

The solution to a quadratic equation that has been placed in the standard form

将二次方程化为标准形式后的解

is given by the quadratic formula

由二次方程给出

Enter values for the coefficients and click outside the data boxes to initiate the calculation.

输入系数的值,并在数据框外单击以开始计算。
a = , b = , c =

The quantity b2 - 4ac =

For b2 ≥ 4ac there are two real roots:

当 b² ≥ 4ac 时,存在两个实根:

x+ = and x- =

x 加上等于和x减去等于
中文译文中的待填/计算数值依次对应:1:xplus 2:xminus。实际数值以上方原输入框为准。

If b2 < 4ac then the roots are complex numbers:

若 $ b^2 < 4ac $,则根为复数:

x+ = + j

and its complex conjugate x- = - j


及其复共轭 x - = - j
中文译文中的待填/计算数值依次对应:1:xmr 2:xmi。实际数值以上方原输入框为准。
Physical applications of the quadratic formula
二次方程的物理应用
Ballistic trajectories
弹道轨迹
a = , b = , c = 量 b² - 4ac =
中文译文中的待填/计算数值依次对应:1:a 2:b 3:c 4:q 5:xpr 6:xpi。实际数值以上方原输入框为准。
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