imaginary number
Pronunciation
Noun
B1 Intermediate
Quick answer
A number that involves the square root of a negative number, written using the symbol i.
Test yourself
Which word fits the gap? "_____ might sound abstract, but engineers use them to describe real electrical currents."
Answer: imaginary number
In your own words, what does "imaginary number" mean?
A number that involves the square root of a negative number, written using the symbol i.
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