Answer to Question #331390 in Discrete Mathematics for lady

Question

$\forall$ x,y $\in$ R, x² +y²=9

Answer 1

This statement is false. Counterexample: let $x=1, y=2$. Both $x,y\in R$. But, $x^2+y^2 = 1+4=5\ne9$.

Answer. The statement is false.