Ответ:
y²-2(2+y)y=3
y²-4y-2y²=3
-y²-4y=3
-y²-4y-3=0
y²+4y+3=0
y²+3y+y+3=0
y(y+3)+(y+3)=0
(y+3)(y+1)=0
y¹=-3; y²=-1
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Ответ:
y²-2(2+y)y=3
y²-4y-2y²=3
-y²-4y=3
-y²-4y-3=0
y²+4y+3=0
y²+3y+y+3=0
y(y+3)+(y+3)=0
(y+3)(y+1)=0
y¹=-3; y²=-1