火炬之光2封面装备:猪都会的数学题
来源:百度文库 编辑:高考问答 时间:2024/05/29 08:07:42
(5Y—1)(-1—5Y)=?
原式=-(5y-1)(1+5y)
=-(5y-1)(5y+1)
=-[(5y)(5y)-1]
=1-25yy
猪都会做,那你怎么还问?
难道你...?
原式=-(5y-1)(1+5y)
=-(5y-1)(5y+1)
=-[(5y)(5y)-1]
=1-25yy
猪都会做,那你怎么还问?
难道你...?