Question

What is the complex conjugate of `2 + i`?

Answer 1

`2-i`

Explanation:

Just like the conjugate of `2+x` is `2-x`, the complex conjugate of `2+i` is `2-i`.

To generalize the rule, the complex conjugate of `a+bi` is `a-bi` —the constant stays the same, and it's added to the opposite of the complex number. Super simple!