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

For each relationships below, explain whether you think it is best
described by a linear or non linear function.

Question: Your height as a function of age (from 0 to 100) I am having a difficult time with functions.
Can you show me how to solve:
1) If f(x)=x2 and g(x)=x1/2, what is f(g(x))?

2) If f(x)= 2x+3 and g(x) = 3-5x, what is