Find both roots of the following equation x^2 + 2x - 4 = 0

There are many methods available to solve this - let's use the quadratic formula in this case.We know the formula is x = (-b +- sqrt(b^2-4ac))/2a.Here a=1,b=2,c=4,Hence, we know that x = (-2 +- sqrt(4 - - 16))/2Let's simplify this to x = -1 +- sqrt(20)/2 = -1 +- sqrt(5)