數學(因式分解)

6(x-2y)+3(2y-x)

= 6(x)+6(-2y)+3(2y)+3(-x) ----->（首先利用彩虹乘法）

= 6x-12y+6y-3x

= (6-3)x+(-12+6)y -------------->（然後同類項相加或相減）

= 3x-6y ------------->（最後因式分解）

= 3(x-2y)

所以最後答案是3(x-2y) .

6(x-2y)+3(2y-x)
=6(x-2y)-3(x-2y)............a-b=-(-a+b)=-(b-a)
=(x-2y)(6-3)
=3(x-2y)

步驟 :

6(x-2y)+3(2y-x)

= 6x-6*2y+3*2y-3x

= 6x-3x-(6-3)*2y

= 3x-3*2y

= 3*x-3*2y

= 3*(x-2y)

所以答案是3*(x-2y) .

6(x-2y)+3(2y-x)
=6(x-2y)-3(x-2y)
=(6-3)(x-2y)

= 6x-12y+6y-3x
= 3x-6y
= 3(x-2y)