Find the tangent plane to z=x2−y2z = x^2 - y^2z=x2−y2 at (1,1,0)(1, 1, 0)(1,1,0).
z=2x−2yz = 2x - 2yz=2x−2y
z=2x+2yz = 2x + 2yz=2x+2y
z=2x−2y−2z = 2x - 2y - 2z=2x−2y−2
z=0z = 0z=0