几道不知道是初中还是高中的数学题 急要答案
问题描述：
几道不知道是初中还是高中的数学题 急要答案
分解因式 27-x^3=
x^3-6x^2+12x-8=
27-x^6=
125m^3+8n^3=
a^3+3ab^2+3a^2b+b^3-c^2=
(m+n)^2-4(m+n-1)=
x^4y^2-6x^2-8=
x^2-3xy+2y^2=
4x^2y^2-5x^2y^2-9y^2=
(a-b)x^2+2ax+a+b=
(a^2-a)x^2-(ab+2b)x-6b^2=
答
1:(3-x)*(9+3x+x^2)
2:x(x-3)^2+3x-8
3:(3-x^2)(9+3x^2+x^4)
4:(6m+2n)(25m^2-10mn+4n^2)
5:(a+b)^3-c^2
6:(m+n)^2-4m-4n+4
=(m+n)^2-4(m+n)+4
=(m+n-2)^2
7:x^2(x^2y^2-6)-8
8:(x-y)(x-2y)
9:-y^2(x+3)(x-3)
10:ax^2-bx^2+2ax+a+b
ax^2+2ax+a-bx^2+b
(ax+a)(x+1)-b(1-x^2)
(ax+a)(x+1)+b(x^2-1)
(ax+a)(x+1)+b(x+1)(x-1)
(x+1)(a(x+1)+b(x-1))
11: