分解因式1.3ab^2-3a^2b2.-9ab+18a^2b^2-27a^3b^33.1/4-1/9x^24.9(x-y)^2-4(x-y)^25.5(x-y)^3+10(y-x)^26.4x^2-20xy+25y^27.-x^2+4xy-6y^28.(a+b)^2+10c(a+b)+25c9.(a-2)^2+4(a-2)+410.(2^2+y^2)^2-4x^2y^211.1-4a^2-9b^2+12ab

Question

分解因式
1.3ab^2-3a^2b
2.-9ab+18a^2b^2-27a^3b^3
3.1/4-1/9x^2
4.9(x-y)^2-4(x-y)^2
5.5(x-y)^3+10(y-x)^2
6.4x^2-20xy+25y^2
7.-x^2+4xy-6y^2
8.(a+b)^2+10c(a+b)+25c
9.(a-2)^2+4(a-2)+4
10.(2^2+y^2)^2-4x^2y^2
11.1-4a^2-9b^2+12ab

Answer 1

1.原式=-3*a*b*(a - b)
2.原式=-9*a*b*(3*a^2*b^2 - 2*a*b + 1)
3原式=-((2*x - 3)*(2*x + 3))/36
4、原式=5*(x - y)^2
5.原式=5*(x - y + 2)*(x - y)^2
6.原式=(2*x - 5*y)^2
7.原式= -x^2+4xy-6y^2
8.原式=a^2 + 2*a*b + 10*c*a + b^2 + 10*c*b + 25*c
9.原式=a^2
10.原式=(x - y)^2*(x + y)^2
11.原式=
- 48*a^2 + 12*a*b - 9*b^2 + 1