作业帮x^2-y^2+4y-4x=x-y-kx+ky=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 14:51:52
x^2-y^2+4y-4x=x-y-kx+ky=
x^2-y^2+4y-4x=
x-y-kx+ky=
x^2-y^2+4y-4x=x-y-kx+ky=
x^2-y^2+4y-4x
=(x+y)(x-y)-4(x-y)
=(x-y)(x+y-4)
x-y-kx+ky
=(x-y)-k(x-y)
=(x-y)(1-k)
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来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 14:51:52
x^2-y^2+4y-4x=x-y-kx+ky=
x^2-y^2+4y-4x=
x-y-kx+ky=
x^2-y^2+4y-4x=x-y-kx+ky=
x^2-y^2+4y-4x
=(x+y)(x-y)-4(x-y)
=(x-y)(x+y-4)
x-y-kx+ky
=(x-y)-k(x-y)
=(x-y)(1-k)