equation 1 : x_i+1=x_i− (f·g_y−f_y·g)/(f_x ·g_y −f_y ·g_x)
equation 2: y_i+1=y_i− (fx·g−f·g_x)/(f_x·g_y-f_y·g_x)

My quesiton are, deriving equations (1) and (2) above and constructing a single Maple function called newt2d that implements both of these recurrence relation.

I apolgize in advance if I don't write my question correctly.  This is my first time posting a question. 

Pick any point P and let Q = (1, −1, 1). [Your choice for P can be anything other than the origin or

Find an equation for the line l1 that passes through P and the origin. Plot the line segment formed by P and the origin in Maple 

How would I plot this?