y2 + 0.8y + 0.16 - 0.25y2 = 0
0.75y2 + 0.8y + 0.16 = 0
D = 0.64 - 0.48 = 0.16
x1 = ( -b + корень с D ) : 2a = ( -0.8 + 0.4 ) : 1.5 = -0.4 : 1.5 = -0.26
x2 = ( -b - корень с D ) : 2a = ( -0.8 - 0.4 ) : 1.5 = -1.2 : 1.5 = -0.8
y2 + 0.8y + 0.16 - 0.25y2 = 0
0.75y2 + 0.8y + 0.16 = 0
D = 0.64 - 0.48 = 0.16
x1 = ( -b + корень с D ) : 2a = ( -0.8 + 0.4 ) : 1.5 = -0.4 : 1.5 = -0.26
x2 = ( -b - корень с D ) : 2a = ( -0.8 - 0.4 ) : 1.5 = -1.2 : 1.5 = -0.8