使每行,每列,斜对角的三个整式,相加等于3X
1.( ) ( ) (-y ) 2.(2/3-y) ( ) ( )
( ) ( ) ( ) ( ) (x ) ( )
(2x+y ) ( ) (4x+3y) ( ) (2y) ( )
人气:215 ℃ 时间:2019-08-30 13:03:58
解答
1 -2x-3y 5x+4y -y
3x+2y x -x-2y
2x+y -3x-4y 4x+3y
2 2/3-y 2x-2y x+3y-2/3
2x+4y-4/3 x 4/3-4y
x-3y+2/3 2y 2x+y-2/3
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