Answer:
[tex]\boxed{\sf 11-2i}[/tex]
Step-by-step explanation:
[tex]\sf (5-5i)-(-6-3i)[/tex]
Opposite of -6 - 3i is 6+3i:
[tex]\sf 5-5i+(6+3i)[/tex]
Combine real and imaginary numbers 5-5i and 6+3i:
[tex]\sf 5+6+(-5+3)i[/tex]
Add 5 to 6, and -5 to 3:
[tex]\sf 11-2i[/tex]
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