Question

x^2 - 4x + c = 0

Answer 1

\[(4\pm \sqrt{16-4c})/2\]

Answer 2

so it is 2+-sqrt(4-c)

Answer 3

Is the answer 4?

Answer 4

no, it does not have a certain answer it depends on c
two answers
\[2+\sqrt{4-c}\]
and
\[2-\sqrt{4-c}\]