(x^2+10x+25)/(4x-5)>=0
(x+5)^2/(4x-5)>=0
x》4/5 или x = -5
<span>(x-2)*(x^2-6x+9)<=0
</span><span>(x-2)(x-3)^2《0
</span>x《2 или x=3
поэтому 4/5《x》2 или x = -5 или x = 3
(8*cos(a)^3-4*cos(a))*sin(a)-8*cos(a)^4+8*cos(a)^2-1
(3.1/3-4.1/2)(3.1/3+4.1/2)=(-1.1/6)(7.5/6)=-7/6 *47/6 = - 329/36 = -9.5/36