Which of the following methods would be easiest to use to solve 2x^2 + 5x - 11 = 0

a) factoring
b) isolating the x^2 term and finding the square root of both sides
c) using quadratic formula
d) all three methods would be easy and effective

The easiest ways is to use the quadratic formula that is:

x' = [-b+√(b² - 4ac)]/2a  and   x" = [-b -√(b² - 4ac)]/2a 

Solving : 2x² + 5x - 11 = 0, gives:

x' = [-5+√(25 - 4(2)(-11)]/4  and   x" = [-5-√(25 - 4(2)(-11)]/4

x' = (-5+√113)/4     &    x" = (-5-√113)/4

9.8? i'm not really sure

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )