Chapter 10 - Systems of Equations and Inequalities - Section 10.6 Systems of Nonlinear Equations - 10.6 Assess Your Understanding - Page 794: 13

See graphs, $(-2,0)$

1. See graphs for $x^2+y^2=4$ and $x^2+2x+y^2=0$ 2. Take the difference between the two equations to get $2x=-4$, thus $x=-2$ 3. Use the first equation with $x=-2$ to find the intersect(s) $(-2,0)$