Question 77254
y=x^2+2x-8
{{{ graph( 300, 200, -6, 5, -10, 10, y = 2x -8) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 2x -8).
according to the graph it is +4 for the x intercept.
also if you set y=0 we get the same answer:
0=2x-8
2x=8
x=8/2
x=4 answer.