x4 + 4x2y2 +16y4 Share with your friends Share 1 Anuradha Sharma answered this The given number is, x4+4x2y2+16y4=x4+8x2y2+16y4-4x2y2=x22+2×x2×4y2+4y22-2xy2 Since a+b2=a2+b2+2ab=x2+4y22-2xy2=x2+4y2+2xyx2+4y2-2xy -1 View Full Answer