Question

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

Answer 1

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,
\(\color{#000000}{ \displaystyle \Delta = 5^2-4(2)(-11)=25+88=113 }\)

Answer 2

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

Answer 3

So, I would use the quadratic formula.

Answer 4

Ok, thanks just making sure

Answer 5

No Problem.