BÁO CÁO MÔN MATLAB Hồ Tấn Đạt Lớp:DH09HH 1.4 >> a=[1 -3 2]; >> r=roots(a) r= >> r=[2 1]; >> poly(r) ans = -3 >> a=[1 -1 2]; >> r=roots(a) r= 0.5000 + 1.3229i MSSV:01939030 0.5000 - 1.3229i >> r=[0.5000 + 1.3229i 0.5000 - 1.3229i]; >> poly(r) ans = 1.0000 -1.0000 2.0001 1.6 >> a=[1 -3 1]; >> r=roots(a) r= -1.8794 1.5321 0.3473 >> r=[1.8794 1.5321 0.3473]; >> poly(r) ans = 1.0000 -3.7588 4.0642 -1.0000 >> r=[-1.8794 1.5321 0.3473]; >> poly(r) ans = 1.0000 -0.0000 -3.0000 1.0000 >> a=[3 -3 -1]; >> r=roots(a) r= -1.2229 1.0000 0.1114 + 0.5101i 0.1114 - 0.5101i >> r=[-1.2229 1.0000 0.1114 + 0.5101i 0.1114 - 0.5101i]; >> poly(r) ans = 1.0000 0.0001 -1.0000 0.3332 -0.3334 3.2 a> >>> A=[2 7;1 ;8 5]; >> B=A' B= b >> A(:,[1 4]) ans = c> >> A([2 3],[3 1]) ans = 3.7 >> b=[5;-1;8;2]; >> A=[2,1,5,5;1,1,-3,-4;3,6,-2,1;2,2,2,-3]; >> u=A\b u= 0.2222 1.2222 0.2222 0.4444 >> b=[2;2;2;2]; >> A=[1,1,1,1;1,2,3,4;2,3,5,9;1,1,2,7]; >> u=A\b u= -2 -6