Question

3x^2-5x-7=0

Answer 1

\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\] with
\[a=3,b=-5,c=-7\]

Answer 2

\[x=\frac{5\pm\sqrt{109}}{6}\]

Answer 3

D=25+84=109

x1 = (5+root109)/6 , x2 = (5-root109)/6

Answer 4

How can I symbol the root ?

Answer 5

just put +- (or use the equation editor)