化简 (x减y)(x加y)加(x减y)加(x加y)等于

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 08:11:46
化简(x减y)(x加y)加(x减y)加(x加y)等于化简(x减y)(x加y)加(x减y)加(x加y)等于化简(x减y)(x加y)加(x减y)加(x加y)等于(x-y)(x+y)+(x-y)(x+y)=

化简 (x减y)(x加y)加(x减y)加(x加y)等于
化简 (x减y)(x加y)加(x减y)加(x加y)等于

化简 (x减y)(x加y)加(x减y)加(x加y)等于
(x-y)(x+y)+(x-y)(x+y)
=2*(x-y)(x+y)
=2(x^2-y^2)
=2x^2-2y^2