m³(a-2)+m(2-a)
=m(a-2)(m²-1)
=m(a-2)(m+1)(m-1)
-8a²b²-4a²b+2ab
=-2ab(4ab+2a-1)
25(m+n)²-4(m-n)²
=[5(m+n)+2(m-n)][5(m+n)-2(m-n)]
=(7m-3n)(3m+7n)
16-24(x-y)+9(x-y)²
=[3(x-y)-4]²
=(3x-3y-4)²
(x-1)(x-3)+1
=x²-4x+3+1
=x²-4x+4
=(x-2)²
追问25(m+n)²-4(m-n)²
16-24(x-y)+9(x-y)²
(x-1)(x-3)+1