勾起来那四题因式分解谢谢😄

勾起来那四题因式分解谢谢😄
勾起来那四题因式分解谢谢😄
 

勾起来那四题因式分解谢谢😄
2x" - 4x
= 2x( x - 2 )
8m"n + 2mn
= 2mn( 4m + 1 )
-24x"y - 12xy" - 28y"'
= -4y( 6x" + 3xy + 7y" )
-4a"'b"' + 6a"b - 2ab
= -2ab( 2a"b" - 3a + 1 )