exam Maths Puzzle Numerical Ability

Please help me solve the equation: (2 + 2i) and ( 2 - 2i)
I have no idea have to solve this.

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exam Other Question

A new swimming club offers memeberships at $200, providing a minimum of 100 people join.For each member in excess of 100, the fee will be reduced by $1 per person, up to 160 people y=3x-1
and
y=negative2x

The x and y are the same in both problems.