а) 2x(3x-1)>4x^2+5x+96x^2-2x>4x^2+5x+96x^2-4x^2-2x-5x>92x^2-7x-9>02x^2-7x-9=0D=(-7)^2-4*2*(-9)=49+72=121x1=7+√121=7+11=18=9\2 2*2 4 4x2=7-√121=7-11=-4\4=-1 2*2 42x^2-7x-9=2(x-9\2)(x+1)2(x-9\2)(x+1)>0 + - +/////////// //////////////----------(-1)--------------(9\2)-------------Ответ:(-∞;-1)U(9\2;+∞)б) 3x^2+40x+10<43-x(x-11)3x^2+40x+10<43-x^2+11x3x^3+x^2+40x-11x<-10+434x^2+29x-33<04x^2+29x-33=0D=29^2-4*4*(-33)=841+528=1369x1=-29+√1369=-29+37=8\8=1 2*4 8x2=-29-√1369=-29-37=-66\8 2*4 8 4x^2-14x+10=4(x+66\8)(x-1)4(x+66\8)(x-1)<0 + - + //////////////////////----------------(-66\8)--------------------------(1)-------------Ответ:(-66\8;1)