1. 3a³b²(x-2y)-9a²b³(x+2y)
2. 3x(x-2)-2(2-x)
我在线等答案!
1. 3a³b²(x-2y)-9a²b³(x+2y)
2. 3x(x-2)-2(2-x)
我在线等答案!
1. 3a³b²(x-2y)-9a²b³(x+2y)
=3a^2b^2[a(x-2y)-3b(x+2y)]
=3a^2b^2(ax-2ay-3bx-6by)
2. 3x(x-2)-2(2-x)
=3x(x-2)+2(x-2)
=(x-2)(3x+2)
1.=3a³b²x-6a³b²y-9a²b³x+18a²b³y
=3a²b²x(a-3b)-6a²b²y(a-3b)
=(a-3b)(3a²b²x-6a²b²y)
=3a²b²(x-2y)(a-3b)
1、3a³b²(x-2y)-9a²b³(x+2y)
=3a²b²[a(x-2y)-3b(x+2y)]
=3a²b²(ax-2ay-3bx-6by)
=3a²b²[(a-3b)x-2(a+3b)y]
2、3x(x-2)-2(2-x)
=3x²-6x-4+2x
=3x²-4x-4
=(3x+2)(x-2)