expand and simplify (x-5)(x+2)
(x-5)(x+2)=x^2+2x-5x-10=x^2-3x-10
\((x-5)(x+2) \\ =(x*x)+(x*2)+((-5)*x)+((-5)*2) \\ = x^{2} +2x-5x-10 \\ = x^{2} -3x-10\)