(-1/3-6)(-1/3+8)-(-1/3+4)(10-1/3)=(-19/3)(23/3)-(11/3)(29/3)=(-19/3*23/3)-(11/3*29/3)=(- 437/9)-(319/9)=-756/9=-84
3(0,4+7)-4(0,8х-3)= 2
1,2 + 21 - 3,2х + 12 = 2
1,2 + 21 + 12 - 2 = 3,2х
32,2 = 3,2х
х = 32,2 : 3,2
х = 10,06
ОДЗ
x+3>0
x+2>0
x>-2
log12 (x+3) + log12 (x+2)=1
log 12 ((x+3)(x+2)) = log12 (12)
(x+3)(x+2)=12
x^2 +5x-6=0
x1=-6 не удовл. ОДЗ
x2=1