Simplify (x-9)(x-4)

$(x - 9) (x - 4)$

Step 1

Expand $(x - 9) (x - 4)$ using the FOIL Method.

Apply the distributive property.

$x (x - 4) - 9 (x - 4)$

Apply the distributive property.

$x \cdot x + x \cdot - 4 - 9 (x - 4)$

Apply the distributive property.

$x \cdot x + x \cdot - 4 - 9 x - 9 \cdot - 4$

$x \cdot x + x \cdot - 4 - 9 x - 9 \cdot - 4$

Step 2

Simplify and combine like terms.

Simplify each term.

Multiply $x$ by $x$ .

$x^{2} + x \cdot - 4 - 9 x - 9 \cdot - 4$

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

$x^{2} - 4 \cdot x - 9 x - 9 \cdot - 4$

Multiply $- 9$ by $- 4$ .

$x^{2} - 4 x - 9 x + 36$

$x^{2} - 4 x - 9 x + 36$

Subtract $9 x$ from $- 4 x$ .

$x^{2} - 13 x + 36$

$x^{2} - 13 x + 36$

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