Odpowiedź:
[tex]a)\ \ -x(x-3a+1)=-x\cdot x-x\cdot(-3a)-x\cdot1=-x^2+3ax-x\\\\b)\ \ 3p(p-2)=3p\cdot p-3p\cdot2=3p^2-6p\\\\c)\ \ -4a(-a+5b+6)=-4a\cdot(-a)-4a\cdot5b-4a\cdot6=4a^2-20ab-24a\\\\d)\ \ 5z(-y+x-z)=5z\cdot(-y)+5z\cdot x+5z\cdot(-z)=-5yz+5xz-5z^2\\\\e)\ \ -2m(n-m+3)=-2m\cdot n-2m\cdot(-m)-2m\cdot3=-2mn+2m^2-6m\\\\f)\ \ k(-g-h)=-gk-hk[/tex]
