Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{8 + 8i}}}}}[/tex]
Option D is the correct option.
Step-by-step explanation:
[tex] \sf{(3 + i) + (5 + 7i)}[/tex]
When there is a ( + ) in front of an expression in parentheses , there is no need to change the sign.
That means, the expression remains the same.
Just remove the unnecessary parentheses
⇒[tex] \sf{3 + i + 5 + 7i}[/tex]
Collect like terms and simplify
⇒[tex] \sf{3 + 5 + i + 7i}[/tex]
⇒[tex] \sf{8 + 8i}[/tex]
Hope I helped!
Best regards!!
