Jacobian Matrix

Consider the function \(f: \mathbb{R}^2\to \mathbb{R}^2\) defined by \(\cv{x\\y}\mapsto \cv{-3\,x-3\,y \\ 1-3\,x^2}\).

Compute the Jacobian matrix \(J(x,y)\) and determine its value in the point \((x,y)=(2,1)\).

\(J(x,y) ={}\)

\(\matrix{\Box & \Box \\ \Box & \Box}\)

\(J(x,y)\Biggl|_{(2,1)} ={}\)

\(\matrix{\Box & \Box \\ \Box & \Box}\)