Question 252020
(5+2i)+(4-7i)
remove parentheses and perform operations (addition)
Remember, if there is no sign, it is plus.
so +1*+4=+4
+1*-7i=-7i
5+2i+4-7i
9-5i

(4-7i)-(5+2i)
4-7i-5-2i
-1-9i