Operations on Complex Numbers
Simplify each of the following and write in the form a + bi.
25\displaystyle \sqrt{{-{25}}} =
 
7\displaystyle \sqrt{{-{7}}} =
 
9+813\displaystyle \frac{{{9}+\sqrt{{-{81}}}}}{{3}} =
 
28+8110\displaystyle \frac{{{28}+\sqrt{{-{81}}}}}{{10}} =