Question

20-(10+√20i)+5+(7+√45i)

Answer 1

[20 - ( 10 + √20 i )]  + [5 + ( 7 + √45 i  )]  = 20 - 10 + √20 i + 5 + 7 + √45 i =

10 + √20 i + 12 + √45 i =   ( 10 + 12 ) + ( √20 + √45 ) i  = 22 + ( 2√5 + 3√5 ) i

= 22 + 5√5 i  

Resposta:  22 + 5√5 i     Ajudei?