Expand using identify (x+3y)2 Share with your friends Share 0 Komal Garg answered this Dear student,Assuming the question is;Q. Expand using identity (x+3y)2Sol. Using identity; (x+y)2=x2+y2+2xy(x+3y)2=(x)2+(3y)2+2×(x)×(3y) =x2+9y2+6xyRegards -1 View Full Answer