The answer is A) 71 R12
Answer:
3)0.4 and 1.8
Step-by-step explanation:
:):):):):):):);):):)
sqrt(-49) / [ (7-2i) - (4+9i) ]
= 7i / (3 - 11i)
= 7i (3+11i) / [ (3 - 11i) (3 + 11i) ]
= (21 i - 77) / (9 + 121) = choice (d), (-77 + 21i) / 130
