Tính A(x)+B(x) và A(x)-B(x) .
Giải thích
A(x)+B(x)
=x6+5x5+2x4+x3+2x2−x+3+−x6−4x5+2x3+3x2+2x−12
=x5+2x4+3x3+5x2+x−9
Ax−Bx=x6+5x5+2x4+x3+2x2−x+3−−x6−4x5+2x3+3x2+2x−12
=2x6+9x5+2x4−x3−x2−3x+15
A(x)+B(x)
=x6+5x5+2x4+x3+2x2−x+3+−x6−4x5+2x3+3x2+2x−12
=x5+2x4+3x3+5x2+x−9
Ax−Bx=x6+5x5+2x4+x3+2x2−x+3−−x6−4x5+2x3+3x2+2x−12
=2x6+9x5+2x4−x3−x2−3x+15