СРОЧНО???!!!!!!!!!!!!!!!!
второй вариант
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(8z + 1)(8z - 3)(9z - 17) = 0
8z + 1 = 0
8z = -1
z₁ = -1/8
8z - 3 = 0
8z = 3
z₂ = 3/8
9z - 17 = 0
9z = 17
z = 17/9
z₃ = 1 8/9