Question

How do you find `abs( 9 + 4i )`?

Answer 1

`|9+4i|=sqrt97`

Explanation:

`|a+bi|` is the absolute value or modulas of complex number `a+bi`

and is given by `sqrt(a^2+b^2)`

Hence `|9+4i|=sqrt(9^2+4^2)=sqrt(81+16)=sqrt97`