Compute the product (x+4)(x−5) (x + 4)(x - 5).

Factoring Trinomials of the Form x² + bx + c

7. Factoring / Factoring Trinomials of the Form x² + bx + c / 문제 3

문제 3

Compute the product $(x + 4) (x - 5)$ .

$x^{2} - x + 20$

$x^{2} + x + 20$

$x^{2} - x - 20$

$x^{2} + x - 20$