Question

P(x)=x(-4-x)/(x+2). Найти p(x)+p(-4-x)

Answer 1

$p(x)= xfrac{-4-x}{x+2} =-xfrac{4+x}{x+2}$

$p(x)+p(-4-x)=-xfrac{4+x}{x+2}-(-4-x)frac{4+(-4-x)}{(-4-x)+2}= \ =-xfrac{4+x}{x+2}-(-4-x)frac{-x}{-2-x}=-xfrac{4+x}{x+2}+(4+x)frac{x}{2+x}=0$

Answer 2

спасибо большое