Question

How do you find `abs( -7 + 5i )`?

Answer 1

The magnitude of any complex number of the form `a + bi` is `sqrt(a² + b²)` In this case `|-7 + 5i| = sqrt74`

Explanation:

`|-7 + 5i| = sqrt(-7² + 5²) = sqrt(49 + 25) = sqrt74`