Simplify (x^2-144)-(x^2-24x+144)

$(x^{2} - 144) - (x^{2} - 24 x + 144)$

Simplify each term.

Apply the distributive property.

$x^{2} - 144 - x^{2} - (- 24 x) - 1 \cdot 144$

Simplify.

Multiply $- 24$ by $- 1$ .

$x^{2} - 144 - x^{2} + 24 x - 1 \cdot 144$

Multiply $- 1$ by $144$ .

$x^{2} - 144 - x^{2} + 24 x - 144$

Simplify by adding terms.

Combine the opposite terms in $x^{2} - 144 - x^{2} + 24 x - 144$ .

Subtract $x^{2}$ from $x^{2}$ .

$0 - 144 + 24 x - 144$

Subtract $144$ from $0$ .

$- 144 + 24 x - 144$

Subtract $144$ from $- 144$ .

$24 x - 288$