(6x+1)^2+2(6x+1)-24=0

36x^2+12x+1+12x+2-24=036x^2+24x-21=0 |:312x^2+8x-7=0D=64+336=400x1=-8+20/24=12/24=0,5x2=-8-20/24=-28/24=-одна целая одна шестая

(6х+1)^2+2(6х+1)-24=0 (6х)^2+2*6х*1+1^2+12х+2-24=0 36х^2+12х+1+12х+2-24=0 36х^2+24х-24=0 Д=24^2-4*36*(-21)=576+3024=3600 Х1=(-24+60)/(2*36)=1/2=0,5 Х2=(-24-60)/(2*36)=-84/72=-7/6