Simplify (2x^2-3x+2)+(x^2-4)

$(2 x^{2} - 3 x + 2) + (x^{2} - 4)$

Remove parentheses.

$2 x^{2} - 3 x + 2 + x^{2} - 4$

Add $2 x^{2}$ and $x^{2}$ .

$3 x^{2} - 3 x + 2 - 4$

Subtract $4$ from $2$ .

$3 x^{2} - 3 x - 2$