Rút gọn phân thức: Q= x^10 - x^8 - x^7 + x^6 + x^5 + x^4 - x^3 -x^2 +1

Q=x10−x8+x7+x6+x5+x4−x3−x2+1x30+x24+x18+x12+x6+1=x10−x8+x6−x7−x5+x3+x4−x2+1x18x12+x6+1+x12+x6+1=x4−x2+1x6−x3+1x12+x6+1x18+1=x4−x2+1x6−x3+1x12+2x6+1−x6x6+1x12−x6+1

=x4−x2+1x6−x3+1x6+1−x6x2+1x4−x2+1x12−x6+1

=x6−x3+1x6+x3+1x6−x3+1x2+1x12−x6+1=1x6+x3+1x2+1x12−x6+1