(A-B-C)²=【A-( )】²=A²-( )+( )=A²+( )如题.
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 10:27:51
x)puuTS64}0Q{:7L:Bh6O5\4C&HƂ̓_`gCgG;i;2Q( 5̆HYe:Ci#'g]#G' vFys}ޤ|ܧk=ٹYKm@ hY
(A-B-C)²=【A-( )】²=A²-( )+( )=A²+( )如题.
(A-B-C)²=【A-( )】²=A²-( )+( )=A²+( )
如题.
(A-B-C)²=【A-( )】²=A²-( )+( )=A²+( )如题.
(A-B-C)²=【A-(B+C)】²=A²-(2A(B+C))+((B+C)²)=A²+(B²+C²+2BC-2AB-2AC)
如果不懂,祝学习愉快!