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

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

Combine the opposite terms in $3 - x^{2} + x^{2} - 4$ .

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

$3 + 0 - 4$

Add $3$ and $0$ .

$3 - 4$

$3 - 4$

Subtract $4$ from $3$ .

$- 1$

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