Answer:
[tex]\textsf{C)} \quad 11-60i[/tex]
Step-by-step explanation:
[tex]\textsf{Multiply }\: (6-5i)^2[/tex]
[tex]\implies (6-5i)(6-5i)[/tex]
[tex]\implies 6(6-5i)-5i(6-5i)[/tex]
[tex]\implies 36-30i-30i+25i^2[/tex]
[tex]\implies 36-60i+25i^2[/tex]
[tex]\textsf{Remember that }i^2=-1:[/tex]
[tex]\implies 36-60i+25(-1)[/tex]
[tex]\implies 36-60i-25[/tex]
[tex]\implies 36-25-60i[/tex]
[tex]\implies 11-60i[/tex]
