What is the sum of √-2 and √-18?
4 √ 2
4 √2i
5 √2
5 √2i
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Answer:
(b) 4√2i
Step-by-step explanation:
√-2 = √2i
√-18 = 3√2i
The sum of these is ...
√-2 +√-18 = √2i +3√2i = (√2i)(1 +3) = 4√2i