# How do you simplify  (x^2 + 2x + 3) + (x^2 - 5)?

$2 {x}^{2} + 2 x - 2$
To simplify this expression, we need to combine like terms, or the terms that share a common variable or lack thereof in the case of $3$ and -$5$:
${x}^{2} + {x}^{2} + 2 x + 3 - 5 = 2 {x}^{2} + 2 x - 2$