Answer:
The simplified form of complex expression is -14+4i
A is correct.
Step-by-step explanation:
Given: [tex]8i^6+6i^5-5i^3-3i^2-7i-9[/tex]
As we know, [tex]i^2=-1[/tex]
[tex]i^6=-1[/tex]
[tex]i^5=i[/tex]
Put the value and simplify i
[tex]\Rightarrow 8(-1)+6(i)-5(-i)-3(-1)-7i-9[/tex]
[tex]\Rightarrow -8+6i+5i+3-7i-9[/tex]3
Combine the like term and simplify it
[tex]\Rightarrow (-8+3-9)+(6i+5i-7i)[/tex]
[tex]\Rightarrow -14+4i[/tex]
Hence, The simplified form of complex expression is -14+4i
