exam Maths Puzzle Numerical Ability

4+2i/2-3i (2+3i/2+3i)


I didnt know how to show fractions other than this way. Sorry...But this is supposed to be two fractions and they are multiplying each other. Thanks

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exam Other Question

Are the sets of lines parallel, perpendicular, or neither:
Line 1 is through (-4,-7) and (1,3) and Line 2 is through (2,6) and (4,10)
Thanks in advance
is this perpendicular or parallel