How can I find the point of intersection of the graphs x^2=y=4 and 2x-y=1 by hand?

Question

I can do the problem using a calculator, but I don't know how to do it by hand. I tried using substitution, but I ending up getting x^2+2x-5=0. It would not factor evenly. Should I use the quadratic to find x and then plug that value in for x and solve for y?

Please tell me if I'm on the right track.

Thanks,

Cori

Yes, use the quadratic equation.