Practice problem
What is the value of x2+y2x^2+y^2x2+y2? {xy=5(x+y)2=20\begin{cases} xy=5\\ (x+y)^2=20 \end{cases}{xy=5(x+y)2=20
444
101010
11\sqrt{11}11
15\sqrt{15}15
Type a concept, like “slope” or “photosynthesis”.
