计算:(1/3a-0.2b)(-0.2b-1/3a)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/21 17:05:12
计算:(1/3a-0.2b)(-0.2b-1/3a)计算:(1/3a-0.2b)(-0.2b-1/3a)计算:(1/3a-0.2b)(-0.2b-1/3a)(1/3a-0.2b)(-0.2b-1/3a

计算:(1/3a-0.2b)(-0.2b-1/3a)
计算:(1/3a-0.2b)(-0.2b-1/3a)

计算:(1/3a-0.2b)(-0.2b-1/3a)
(1/3a-0.2b)(-0.2b-1/3a)
=(-0.2b+1/3a)(-0.2b-1/3a)
=(-0.2b)²-(1/3a)²
=0.04b²-1/9a²