Question

What's m2-5m-14=0 solved using the quadratic formula?

Answer 1

The answers are x=7 or x=-2 

$x=-b$+$\sqrt{b ^{2} -4ac}$/2
x=5 + $\sqrt{(-5) ^){2}-4(1)(-14 }$/2
x=5 +$\sqrt{25+56}$/2
x=5 +$\sqrt{81}$/2
x=5 +$\sqrt{81}$/2.....x=7
or
x=5 - $\sqrt{81}$/2....x=-2