问题
填空题
化简：
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答案
=a2bc ab
=ac；ab(ac) ab
=x2-4 x2-4x+4
=(x+2)(x-2) (x-2)(x-2)
；x+2 x-2
=2x-2 1- x2
=-2(x-1) (1-x)(1+x)
．2 x+1
搜题请搜索小程序“爱下问搜题”
化简：
|
=a2bc ab
=ac；ab(ac) ab
=x2-4 x2-4x+4
=(x+2)(x-2) (x-2)(x-2)
；x+2 x-2
=2x-2 1- x2
=-2(x-1) (1-x)(1+x)
．2 x+1