## Algebra 2 Common Core

$$x^{2}-2x-15$$
Distribute $x$ and $-5$, then add like terms: $$(x-5)(x+3)=$$ $$x(x)+x(3)-5(x)-5(3)=$$ $$x^{2}+3x-5x-15=$$ $$x^{2}-2x-15.$$