exam Maths Puzzle Numerical Ability

Please help with this one i keep getting stuck.
(4-4i)-(-3-2i)

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exam Other Question

Convert to exponential form. For example, the exponential form of "log5 25 = 2" is "52 = 25".
log 3 27 = 3
Any help is appreciated.
Thank You

Factor the trinomial
t^3-2t^2-63t