1) 6x² -22x -8 =0
D=b²-4ac(a=6,b= -22,c= -8)
D =22² -4*6*(-8) =676=26²
x1,x2 =(-b+-vD)/2a
x1 =(22 -26)/12= -4/12= -1/3
x2 =(22+26)/12 =4
ответ: x= -1/3, x =4
2) (2x-3)² +1 =11x -18
4x² -12x +9 +1 -11x +18 =0
4x² -23x +28 =0
D=529 -4*4*28 =529-448 =81 =9²
x1 =(23 -9)/8 =1.75
x2 =(23 +9)/8 =4
ответ: x =1.75, x =4