C-03-Q117mediumsingle_mcqx2+2x+1+y2−2y+1=?x^2 + 2x + 1 + y^2 - 2y + 1 = ?x2+2x+1+y2−2y+1=?a(x+1)2+(y−1)2(x+1)^2 + (y-1)^2(x+1)2+(y−1)2b(x+1)(y−1)(x+1)(y-1)(x+1)(y−1)c(x+y)2(x+y)^2(x+y)2dx2+y2x^2 + y^2x2+y2