(2/3x-1/4x)(-2/3x+1/4y)
问题描述:
(2/3x-1/4x)(-2/3x+1/4y)
请用完全平方公式计算
答
是化简吧
(2/3x-1/4x)(-2/3x+1/4x)
=-[(2/3x-1/4x)(2/3x-1/4x)]
=-(2/3x-1/4x)^2
=-25/144x^2