1)8х^3-32х^2-8х^3-12х^2-18х+12х^2+18х+27-17=-32х^2+10
-32*0.25+10=2
2)12a^3-8a^2-12a^3+12a^2-3a-4a^2+25=-3a+25
-3*3.3+25=15.1
3)27x^3+9x^2 b-9x^2 b-3xb^2+3xb^2+b^3-27x^3+9xb-b^3=9xb=9*(-1/3)*(2/3)=-2
4)9x^3-4xy^2-9x^3+12x^2y-4xy^2+10x^2y+4xy^2=-4xy^2+24x^2y
-4(-1/3)*(2/3)^2+24(-1/3)^2*(2/3)=-(16/27)+(16/27)=0
Log(0.5)(3x - 1) + log(0.5)(1/4) = 0
log(0.5)(0.75x - 0.25) = 0
0.75x - 0.25 = 1
0.75x = 1 + 0.25 = 1.25
x = 1.25/0.75 = 5/3 - удовлетворяет ОДЗ
ОДЗ: 3x - 1 > 0, x>1/3
Ответ: x = 5/3
X - |x - 1| > -2
x + x - 1 > - 2
2x > -1
x > -0.5
Ответ: x∈(-1/2, ∞)