Đáp án: 1) = 5xy ( xy + 3x + 6y )
2) = 5xy ( 2x - 3y + 5xy )
3) = ( x -1 ) ( 3 - 5x )
4) = ( x² - 1 ) ( x +3 )
5) = ( 2x - 5 ) ( 12y + 6xy ) = ( 2x - 5) 6y ( 2 -x )
6) = 2y ( x + 3 ) + z ( 3 + x ) = ( 3+x) ( 2y + z )
7) = 5x ( x + y) - ( x + y ) = ( x+ y ) ( 5x - 1)
8) = 2x ( x - y ) - 7 ( x-y ) = ( x- y) ( 2x - 7)
9) = x ( x + y ) - 3 ( x+ y ) = ( x+ y) ( x- 3)
10) = x( x+1) - y ( x+ 1) = ( x+ 1) ( x- y)
11)= ( x-y) ² - z ( x- y) = ( x - y) ( x- y - z)
Giải thích các bước giải:
