i have the same problem as this guy

http://www.mathhelpforum.com/math-he...ersection.html

i did what he did but didn't get the same results

this is what i do

in the y= editor i put in

y1=2x

y2=-2x

then i graph it

press f5 and enter intersections

then its gives me

1st curve ?

xc:.126582

yc:-.253165

well the answer is clearly 0,0 which i am not getting