Question 1151806
find absolute value of each complex number
2+4i=
/4+16
/20= 2/5

my question is how it became from square root of/20 to 2/5?
<pre>/4 + 16 <===== This is actually {{{sqrt(4 + 16)}}}, which YOU should've written as: sqrt(4 + 16)
/20 <========= This is actually {{{sqrt(20)}}} which shoudld've been written as sqrt(20)
2/5 <========= This is actually {{{2sqrt(5)}}}, which YOU should've written as 2sqrt(5)
You <b>CANNOT</b> use "/" in place of the square root symbol!