X^2 - 2X - 3 = 0
D = 4 + 12 = 16 ; √ D = 4
X1 = ( 2 + 4 ) : 2 = 3
X2 = ( 2 - 4 ) : 2 = - 1
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X^2 + 4X - 5 = 0
D = 16 + 20 = 36 ; √ D = 6
X3 = ( - 4 + 6 ) : 2 = 1
X4 = ( - 4 - 6 ) : 2 = - 5
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Ответ 3 ; - 1 ; 1 ; - 5