Помогите решить!!!!!!!!! 7x^2+6x+1=0    3x^2-124x-84=0

7X^2 + 6X + 1 = 0 D = 36 - 4*7*1 = 36 - 28 = 8  V D = V 8 = 2 V 2  X1 = ( - 6 + 2 V 2 ) / 14 = ( - 3 + V 2 ) / 7  X2 = ( - 6 - 2 V 2 ) / 14 = ( - 3 - V 2 ) / 7 ====================== 3X^2 - 124X - 84 = 0 D = 15376 - 4*3*(-84 ) = 15376 + 1008 = 16384 V D = 128  X1 = ( 124 + 128 ) : 6 = 42  X2 = ( - 4 ) : 6 = ( - 2/3 )