PTĐTTNT a,x3-3 b,8x3+12x2y+6xy2+y3 c,27-27x+9x2-x3 d,x+y2+2x+y+1 e,4y2z2-y2+z2+z2-x22 f,x2+y2-52-4xy+22 g,4x2-3x-182-4x2+3x2 h,x+2y-32-4x+2y-3+4 k,x2+x-12+4x2+4x
Đăng ký qua Facebook hoặc Google: