初二因式分解分解因式1..4xy-3xz+8y-6z2.a^2-x^2-2x-2a3.1-m^2-n^2+2mn题目没有错误,我检查过了,

Question

初二_________因式分解
分解因式
1..4xy-3xz+8y-6z
2.a^2-x^2-2x-2a
3.1-m^2-n^2+2mn
题目没有错误,我检查过了,

Answer 1

1..4xy-3xz+8y-6z
=x(4y-3z)+2(4y-3z)
=(x+2)(4y-3z)
2.a^2-x^2-2x-2a
=(a+x)(a-x)-2(x+a)
=(x+a)(a-x-2)
3.1-m^2-n^2+2mn
=1-(m^2-2mn+n^2)
=1-(m-n)^2
=(1+m-n)(1-m+n)