Evaluate (x+3)(x-4)

$(x + 3) (x - 4)$

Expand $(x + 3) (x - 4)$ using the FOIL Method.

Apply the distributive property.

$x (x - 4) + 3 (x - 4)$

Apply the distributive property.

$x \cdot x + x \cdot - 4 + 3 (x - 4)$

Apply the distributive property.

$x \cdot x + x \cdot - 4 + 3 x + 3 \cdot - 4$

$x \cdot x + x \cdot - 4 + 3 x + 3 \cdot - 4$

Simplify and combine like terms.

Simplify each term.

Multiply $x$ by $x$ .

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

Move $- 4$ to the left of $x$ .

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

Multiply $3$ by $- 4$ .

$x^{2} - 4 x + 3 x - 12$

$x^{2} - 4 x + 3 x - 12$

Add $- 4 x$ and $3 x$ .

$x^{2} - x - 12$

$x^{2} - x - 12$

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