Х ( х^2 - 4) - (x^3 - 3x^2 + 3x^2 - 9x + 9x - 27) =
= x^3 - 4x - x^3 + 3x^2 - 3x^2 + 9x - 9x + 27 =
= - 4x + 27 ;
При х = 6 → - 4х + 27 = (-4)* 6 + 27 = - 24 + 27 = 3
5/9 x =5целых 3/5 = 5*5+3=28
1)38*(-3)=-114
2)(-24)*(-4)=96
3)(-16)*(-30)=480
4)-114+96=-18
5)-18+480=462
1)-2,8+6,1=3,3
2)3,3-3,4=-0,1
3)-0,1+6,2=6,1
4)6,1*(-3,4)=-20,74
-3 1/3+2 5/6=(-20+17)/6=-3/6=-1/2
2)-8 5/9+7 2/9=-1 3/9=-1 1/3
3)(-1/2)*(-4/3)=2/3