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.
let a = \langle 3, -1 \rangle and b = \langle -4, 0 \rangle , calcule a * b
let a = \langle 3, -1 \rangle and b = \langle -4, 0 \rangle , calcule a * b
Natural Language
Math Input
Extended Keyboard
