Question 932181
The roots of the equation are {{{(2 + 9i)}}} and {{{(2-9i)}}}.

the equation will be:  

{{{(x-(2 + 9i))(x-(2 -9i))=0}}}

{{{(x-2-9i)(x-2+9i)=0}}}

{{{x^2-2x+9i*x-2x+4-18i+18i*x-9i*9i=0}}}

{{{x^2-4x+4-81(-1)=0}}}

{{{x^2-4x+4+81=0}}}

{{{x^2-4x+85=0}}}


What is the value of c?

so, {{{c=85}}}