Question

How do I solve this?​

Answer 1

`\large\boxed{4√(-81)+√(-25)=41i}`

Explanation:

`i=√(-1)\\\\√(-81)=√((81)(-1))=√(81)\cdot√(-1)=9i\\\\√(-25)=√((25)(-1))=√(25)\cdot√(-1)=5i\\\\4√(-81)+√(-25)=4(9i)+5i=36i+5i=41i`