Автор - s020

√a+3=0
|-9y|+1.2=0
(y-8) ²+121=0
(z+4) ²=0

Ответ

Автор - altowa1
(z+4)^2=0
z^2+8z+16=0
D=8^2-4×1×16=64-64=0
z=(-8+0)/2×1=-8/2=-4

|-9y|+1,2=0
|-9y|=-1,2
y=-1,2/-9
y=1,2/9

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