Odpowiedź:
[tex]e)\ \ 9pr+(pr)^2+3p^2r^2=9pr+p^2r^2+3p^2r^2=9pr+4p^2r^2=pr(9+4pr)\\\\f)\ \ 8a^2b-20a^3b^2+4ab=4ab(2a-5a^2b+1)\\\\c)\ \ 15ab-5a^2+10ac=5a(3b-a+2c)\\\\d)\ \ st^2+28^2t^3-45^2t^2=t^2(s+28^2t-45^2)=t^2(s+784t-2025)\\\\a)\ \ 6a-24b+30c=6(a-4b+5c)\\\\b)\ \ 2xy+3x-x^2y=x(2y+3-xy)[/tex]
