Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
焦点 (3, 0) 、准线 x = -3 的抛物线方程。(答: y^2 = 12x 。)
焦点 (3, 0) 、准线 x = -3 的抛物线方程。(答: y^2 = 12x 。)
Natural Language
Math Input
Extended Keyboard