长方体的认识评课稿:因式分解xy-x-y+1
来源:百度文库 编辑:中科新闻网 时间:2024/05/10 08:30:02
xy-x-y+1
=x(y-1)-y+1
=x(y-1)-(y-1)
=(y-1)(x-1)
x(y-1)-y+1
X(y-1)+(y-1)
(X+1)(Y-1)的平方
应该是吧
不确定
=(Xy-X)+(-y+1)
=X(y-1)-(y-1)
=(y-1)(X-1)
(x-1)(y-1)
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来源:百度文库 编辑:中科新闻网 时间:2024/05/10 08:30:02
xy-x-y+1
=x(y-1)-y+1
=x(y-1)-(y-1)
=(y-1)(x-1)
x(y-1)-y+1
X(y-1)+(y-1)
(X+1)(Y-1)的平方
应该是吧
不确定
=(Xy-X)+(-y+1)
=X(y-1)-(y-1)
=(y-1)(X-1)
(x-1)(y-1)