X = Y - 2
Y^2 - 4 * ( Y - 2 ) = 13
Y^2 - 4Y + 8 - 13 = 0
Y^2 - 4Y - 5 = 0
D = 16 + 20 = 36
V D = 6
Y1 = ( 4 + 6) : 2 = 5
Y2 = ( - 2 ) : 2 = - 1
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X = Y - 2
X1 = 5 - 2 = 3
X2 = - 1 - 2 = - 3
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Ответ: ( 3 ; 5 ) ; ( - 3 ; - 1 )