Find the limit by rewriting the fraction first. y + 144 lim (X,y)- (12, - 144) x y - xy + 144x2 - 144x y # - 144, xx2 . . . y + 144 lim E 2 (Simplify your answer.) (x,y)- (12, - 144) X y - xy + 144x - 144x y* - 144, xx2