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TopKartafan

Ответ:

2)6;-2 3)

Пошаговое объяснение:

2) x+4=корень(28+12x)

(x+4)^2=28+12x

x^2 + 8x + 16 = 28 + 12x

x^2 - 4x - 12 = 0

D=16+48=64=8^2

x1= 6

x2= -2

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