一朵月季
春芽
共回答了22个问题采纳率:86.4% 举报
x^5-6x^4+7x^3-4x^2+38x+1
=x^3(x^2-4x)-2x^4+7x^3-4x^2+38x+1
=-x^3-2x^4+7x^3-4x^2+38x+1
=-2x^4+6x^3-4x^2+38x+1
=-2x^2(x^2-4x)-2x^3-4x^2+38x+1
=2x^2-2x^3-4x^2+38x+1
=-2x^3-2x^2+38x+1
=-2x(x^2-4x)-10x^2+38x+1
=2x-10x^2+38x+1
=-10x^2+40x+1
=-10(x^2-4x)+1
=10+1
=11
1年前
4