Ответ:
z(8-z)+z-8-0=
8z-z^2+z-8=0
-z^2+9z-8=0
z^2-9z+8=0
z1/2=(9+-√(81-32))/2
z1/2=(9+-7)/2
z1= 8
z2= 1
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Ответ:
z(8-z)+z-8-0=
8z-z^2+z-8=0
-z^2+9z-8=0
z^2-9z+8=0
z1/2=(9+-√(81-32))/2
z1/2=(9+-7)/2
z1= 8
z2= 1