... x4+5x3 -x2 + x - 0,5+ N(x)=3x4 -5 x2 -x -2 ,5 M(x)+N(x) =4x4+5x3 -6 x2 - 3 "#G#=# b) M(x)= x4+5x3 -x2 + x - 0,5 - N(x)=3x4 -5 x2 -x -2 ,5 M(x)-N(x) =-2 x4+5x3+4x2 ... /0a"9./0*:,'(h&'iF8D= 2x5+ 5x4 - x3 + x2 - x -1 + x4 - x3 -5 x - 2=2x5+(5x4+x4)+( -x3-x3) +x2 +(-x -5 x)+ (-1 -2 )=2x5 + 6x4 - 2x3 +x2 -6 x -3 'jkIlFG(m,nLo`$Vf*pFG$VXg,KF' ... cng đa thức ở bài 6 )Cch 2:(Thực hiện theo ct dc)Cách 2:Q(x) = P(x) = 2x5+ 5x4 - x3 + x2 - x - 1-x4+ x3+5x + 2 - P(x)-Q(x) = -2 x3-x3-x3=2x5 -0 = +6x4 5x4 -( -x4)=...