а) 6x^2>5x-16x^2-5x+1>06x^2-5x+1=0D=(-5)^2-4*6*1=25-24=1x1=5+√1=5+1=6=1\2 2*6 12 12x2=5-√1=5-1=4=1\3 2*6 12 126x^2-5x+1=6(x-1\2)(x-1\3)6(x-1\2)(x-1/3)>0 + - +/////////////// //////////////-------------(1\3)------------------(1\2)-------------Ответ:(-∞;1\3)U(1\2;+∞)б) -5x^2<6-11x-5x^2-6+11x<0-5x^2+11x-6<0-5x^2+11x-6=0D=11^2-4*(-5)*(-6)=121-120=√1x1=-11+√1=-11+1=-10\-10=1 2*(-5) -10x2=-11-√1=-11-1=-12\-10=1.2 2*(-5) -10-5x+11x-6=-5(x-1)(x-1.2)-5(x-1)(x-1.2)<0 - + -////////////////// /////////////////////-----------------(1)----------------(1.2)----------------------Ответ: (-∞;1)U(1.2;+∞)