Question

(x + 1)(x* -x+1) - x(x + 3)(x-3)​

Answer 1

Ответ:

(х+1)(х^2-х+1)-х(х+3)(х-3)=х^3-х^2+х+х^2-х+1-х^3-9х^2=-9х^2+х+1=9х^2-х-1