Given that z = -4 + 5i is a solution of the equation z3 + Az2 + 17z — 123 = 0, find the value of A.

Given that (2 + i) is a root of z3 — z2 — 7z + 15 = 0, find the other two roots.
Given that z = -4 + 5i is a solution of the equation z3 + Az2 + 17z — 123 = 0, find the value of A.

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