Question

if x + y = 3,x² + y² = 5 then xy is​

Answer 1

Answer:

$x + y = 3 \\ {(x + y)}^{2} = {3}^{2} \\ {x}^{2} + {y}^{2} + 2xy = 9 \\ 2xy = 9 - 5 \\ xy = \frac{4}{2} \\ xy = 2$