Complex Numbers
please helpppppp and show solutions
1.) (3-7i) + (-1-2i)
2.) (4-5i) - (2-3i)
3.) (7-5i) + (6+9i)
4.) 2+3i/3-5i
(1):(3-7i)+(-1-2i)
-3-7i-1+2i
-7i+2i-3
-3-5i.......
(2):(4-5i)+(7-3i)
4-5i+7-3i
4+7-5i-3i
11-8i
(3): (7-5i)+(6+9i)
7-5i+6+9i
7+6-5i+9i
13+4i
(4):3+2i/3-5i nothing to simplify