[tex]
1)~12a-27=3(4a-9)\\\\
2)~16k-24=8(2k-3)\\\\
3)~48w^2-36w=12w(4w-3)\\\\
4)~75x^2y-120xy=15xy(5x-8)\\\\
5)~4a^3b-8a^2b^2+2ab^3=2ab(2a^2-4ab+b^2)\\\\
6)~30m^4n^3-12m^3n^2+6m^2n=6m^2n(5m^2n^2-2mn+1)\\\\
7)~x^2-81=(x-9)(x+9)\\\\
8)~a^2-25b^2=(a-5b)(a+5b)\\\\
9)45m^3n-5mn=5mn(9m^2-1)=5mn(3m-1)(3m+1)\\\\
10)~98x-8x^3=2x(49-x^2)=2x(7-x)(7+x)
[/tex]
