The roots of the quadratic equation z^2 + bz + c = 0 are -7 + 2i and 7 - 2i. What is b+c?
What is b+c?
Hello Guest!
\((z-(-7 + 2i)) * (z-(7 - 2i))=0\\ (z-(7-2i))(z+(7-2i))=0\\ z^2-(45-28i)=0\)
\(z^2 + bz + c = 0\)
\(b=0\\ c=-45+28i\\ \color{blue}b+c=-45+28i\)
!
!
