Help Solve x^2+2x-4=0

Question

What is the solution

Answer 1

There is no rational root, use the quadratic formula:

a=1,b=2,c=-4
x=(-b±sqrt(b²-4ac))/2a
=(-2±sqrt(2²-4(1)(-4))/2
=-1±sqrt(5)

Substitute the solutions into the original equations to check the answer.