Question

(x-3)^2-(x+3)•(x-3) при x=-1,5

Answer 1

Ответ:

18

Объяснение:

$\displaystyle (x-3)^2-(x+3)(x-3) =x^2-6x+9-(x^2-9)=x^2-6x+9-x^2+9=-6x+18\\\\x=-1.5\quad\\\\ -6*(-1.5)+18 = 27$