Question

даю 70 баллов!!!!!!!!!

Answer 1

Ответ:

(1;-1); (-1;-3)

Объяснение:
y^2 - 2(y+2)*y=3
y^2 - 2y^2 - 4y = 3
-y^2 - 4y - 3 = 0
y^2 + 4y + 3 = 0
Д = 4^2 - 4*1*3 = 16 -12 =4
sqrtD = 2
y1 = (-4+2)/(2*1) = -1
y2 = (-4-2)/(2*1) = -3

x1 = -1+2=1
x1 = -3+2= -1

Answer 2

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