Question 179516
1. (-4+2i)+(6-3i) 
= 2-i
------
2. 6√-12 
= {{{12sqrt(-3)}}}
= {{{12isqrt(3)}}}
-----------
3. √-8*√-32
={{{sqrt(-8*(-32))}}}
={{{sqrt(256)}}}
=16
------------- 
4. i^65 
={{{i^64*i}}}
=i
---------------
5. i^89
={{{i^88*i}}}
=i