(1/2y+ )( +3x)=9x^2-1/4y^2

分类: 作业答案 • 2022-01-21 19:11:16

问题描述：

(1/2y+ )( +3x)=9x^2-1/4y^2
(1/2y+_______ )( _________+3x)=9x^2-1/4y^2

答

(1/2y+3x )( -1/2y+3x)=9x^2-1/4y^2