6x^5-4x^3+5x^2+3x+8=6x^5+6x^4-6x^4-6x^3+2x^3+2x^2+3x^2+3x+8=6x^4(x+1)-6x^3(x+1)+2x^2(x+1)+3x(x+1)+8=(x+1)(6x^4-6x^3+2x^2+3x)+8前一项包含因式x+1,能被x+1整除,常数项8不能被x+1整除.余数是8....