(ax立方-x+6)(3x平方+5x+b)=6x五次方+10x四次方-7x三次方+13x平方+32x-12.3ax^5+5ax^4+abx^3-3x^3-5x^2-bx+18x^2+30x+6b=6x五次方+10x四次方-7x三次方+13x平方+32x-123a=65a=10ab-3=-7 -b+30=32 6b=-12a=2 b=-2...