因式分解：-3x^3+6x^2y-3xy^21.-3x^3+6x^2y-3xy^22.4a^2+4a+13.(x^2-3)^2-1_数学解答

因式分解：-3x^3+6x^2y-3xy^2
1.-3x^3+6x^2y-3xy^2
2.4a^2+4a+1
3.(x^2-3)^2-12(x^2-3)+36

人气：198 ℃　时间：2019-12-01 13:36:08

解答

-3x^3+6x^2y-3xy^2
=-3x(x^2-2xy+y^2)
=-3x(x-y)^2
4a^2+4a+1
=(2a+1)^2
(x^2-3)^2-12(x^2-3)+36
=[(x^2-3)-6]^2
=(x^2-9)^2
=(x+3)^2(x-3)^2