Odpowiedź:
[tex]2(a+b)=2\cdot a+2\cdot b=2a+2b\\\\4(3x-5y)=4\cdot3x-4\cdot5y=12x-20y\\\\-5(2m-3n)=-5\cdot2m-5\cdot(-3n)=-10m+15n\\\\\\\\3(x+2y-6)=3x+3\cdot2y-3\cdot6=3x+6y-18\\\\-2(4-3s+5t)=-2\cdot4-2\cdot(-3s)-2\cdot5t=-8+6s-10t\\\\x(2y-54)=x\cdot2y-54x=2xy-54x\\\\\\\\x(2x^2-x+7)=x\cdot2x^2-x\cdot x+7\cdot x=2x^3-x^2+7x\\\\3p(-2p^2+5p-2)=-3p\cdot2p^2+3p\cdot5p-3p\cdot2=-6p^3+15p^2-6p\\\\a(b+a-ab)=a\cdot b+a\cdot a-a\cdot ab=ab+a^2-a^2b[/tex]
