exam Maths Puzzle Numerical Ability

Can you factor (tł-8)?

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p.16 #23
I cannot figure out how to create an equation from the following complex numbers
a) 2+i and 2-i
b) 3+2i and 2-3i

thaks!
Can you explain and figure it out for me of how to graph an equation in the form of y=mx+b.I need to know how to do this later.

y=2x-3