Question

How do you find a complex solution?
ie. x^2-18x+78=-8

Answer 1

\[x^2-18x+78=-8\\
x^2-18x=-86\] is a start

Answer 2

then \[(x-9)^2=-86+81=-5\]

Answer 3

and so
\[x-9=\pm \sqrt{5}i\]

Answer 4

Okay thank you!!!!!!!!!!!!

Answer 5

yw