Question

-4a³(x-y)+6a²(x-y)-2a(x-y)

因式分解,只用写得数.
①2a²-4a.②-2a³b²+6a²b-2ab.③m(a-3)+2(3-a).④4x(x-y)²-12(x-y)³

Answer 1

①2a²-4a.
=2a(a-2)
②-2a³b²+6a²b-2ab.
=-2ab(a²b-3a+1)
③m(a-3)+2(3-a).
=(a-3)(m-2)
④4x(x-y)²-12(x-y)³
=-4(x-y)²(2x-3y)