а)х2+6х+4=0    

D = b^2-4ac = 6^2 - 4*1*4 = 36 - 16 = 20

VD = V20 V(4*5) = 2V5

             -6 + 2V5

x1 = ------------------- 

                   2

              -6 - 2V5

x2 = --------------------

                   2

б)х2+106х+693=0

D = b^2 - 4ac = 106^2 - 4*1*693 = 11236 - 2772 = 8464

VD = V8464 = 92

x1 = (-106 + 92)/2 = -14/2 = -7

x2 = (-106 - 92)/2 = -198/2 = -99

Verified answer

Вот тебе все решения сама смотри