Practice problem
How many real solutions does the system x2+y2=1x2−y2=5\begin{align*} x^2 + y^2 &= 1 \\ x^2 - y^2 &= 5 \end{align*}x2+y2x2−y2=1=5 have?
0
1
2
∞\infty∞
Type a concept, like “slope” or “photosynthesis”.
