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.
f(x,y) = Piecewise[{{ 9*x + 16*abs(y) - 9*x^9 , x<=0},{5*sqrt(9*x^2 + 16 * y^2), x>=abs(y)},{9*x+16*abs(y), 0<x<abs(y)}}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random