## anonymous 5 years ago x^2 - 4x + c = 0

1. anonymous

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

2. anonymous

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

3. anonymous

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