1.(a-4)^2+(b-4)^2+2(ab-8)2.ac^2(2b+3c)^2-ab^2(3c+2b)^2

1.(a-4)^2+(b-4)^2+2(ab-8)2.ac^2(2b+3c)^2-ab^2(3c+2b)^2
1.(a-4)^2+(b-4)^2+2(ab-8)
2.ac^2(2b+3c)^2-ab^2(3c+2b)^2

1.(a-4)^2+(b-4)^2+2(ab-8)2.ac^2(2b+3c)^2-ab^2(3c+2b)^2
1.(a-4)^2+(b-4)^2+2(ab-8)
=a^2-8a+16+b^2-8b+16+2ab-16
=a^2+2ab+b^2-8a-8b+16
=(a+b)^2-8(a+b)+16
=(a+b-4)^2
2.ac^2(2b+3c)^2-ab^2(3c+2b)^2
=a[c(2b+3c)+b(3c+2b)][c(2b+3c)-b(3c+2b)] 提取工因式+平方差公式
=a（2b^2+5bc+3c^2）(3c^2-bc-2b^2)
=a(2b+c)(b+3c)(c-b)(3c+2b)