(a) w = x^2 + y^2 + 2ixy ;
(b) w = x(x^2 - 3y^2) - iy(3x^2 - y^2) ;
(c) w =
(2(x^2 + y^2) - (x + iy))/
(4(x^2 + y^2) - 4x + 1)

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .