SOLUTION: Good evening sir, please sir help me up with this problem 1 by 3 plus 3i whole cube is the question sir

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Question 759524: Good evening sir,

please sir help me up with this problem
1 by 3 plus 3i whole cube is the question sir

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
if you mean this:

, then

......multiply denominator









.......recall that





.....multiply both numerator and denominator by to eliminate from denominator














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