Simplify 10 over quantity of 8 minus 5 i.
quantity of negative 80 plus 50 i over 89
quantity of 80 plus 50 i over 89 10 i over
quantity of 5 plus 8 i
quantity of 80 minus 50 i over 39

The correct answer for this question is this one: "(80 + 50i) / 89" or quantity of negative 80 plus 50 i over 89 

The expression is 10 over quantity of 8 minus 5 i. 
10 / (8 - 5i)

= 10 / (8 - 5i) * (8 + 5i) / (8 + 5i)
= 10 * (8 + 5i) / (64 +25)
= (80 + 50i) / 89

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