字典翻译 问答 其它 1.(x^2y-xy^2)除以(x-y)2.x^2-5x-+63.3x^2-8x+4解方程1,x^2-4x+3=02.2y^2-5y+2=0
问题标题:
1.(x^2y-xy^2)除以(x-y)2.x^2-5x-+63.3x^2-8x+4解方程1,x^2-4x+3=02.2y^2-5y+2=0
问题描述:

1.(x^2y-xy^2)除以(x-y)2.x^2-5x-+63.3x^2-8x+4解方程1,x^2-4x+3=02.2y^2-5y+2=0

程志红回答:
  1.(x^2y-xy^2)/(x-y)   =xy(x-y)/(x-y)   =xy   2.x^2-5x-+6   x^2-5x+6=(x-2)(x-3)   x^2-5x-6=(x-6)(x+1)   3.3x^2-8x+4   =3x^2-6x-2x+4   =3x(x-2)-2(x-2)   =(x-2)(3x-2)   解方程1,x^2-4x+3=0   (x-1)(x-3)=0   x1=1,x2=3   2,2y^2-5y+2=0   (2y-1)(y-2)=0   y1=1/2,y2=2
点击显示
其它推荐
热门其它推荐
  • 其它