Which method is most efficient method to use to solve 2x^2+5x-11=0

Question

solomonzelman · Answer

The discriminant is:
$\color{#000000}{    \displaystyle   \Delta = b^2-4ac           }$

$\color{#000000}{    \displaystyle  a=2        }$
$\color{#000000}{    \displaystyle  b=5        }$
$\color{#000000}{    \displaystyle  c=-11        }$

In this case,
$\color{#000000}{    \displaystyle   \Delta = 5^2-4(2)(-11)=25+88=113           }$

solomonzelman · Answer

Since the discriminant is not a perfect square,
therefore you can not factor this equation.

solomonzelman · Answer

So, I would use the quadratic formula.

scarlettfarra2000 · Answer

Ok, thanks just making sure

solomonzelman · Answer

No Problem.