x=x1所以x1²=-3x1-1x1³=x1*x1²=x1(-3x1-1)=-3x²-x1=-3(-3x1-1)-x1=8x1+3且x1++x2=-3所以原式=8x1+3+8x2+20=8(x1+x2)+23=-24+23=-1
-1
