Question

oblicz, krok po kroku.
(n+2)•(2n - 2)=

(-n+2)•(n-2)=

(n-2)•(-2n-n)=

(2n-1)•(-2n+2)=

(-n-2)•(-n-2)=

Answer 1

(n+2)•(2n - 2)= 2n² - 2n + 4n - 4 = 2n² + 2n - 4

(-n+2)•(n-2)=2n - n² +2n - 4 = 4n - n² - 4

(n-2)•(-2n-n)= -2n² - n² + 4n + 2n = -3n² + 6n

(2n-1)•(-2n+2)= -4n² + 4n + 2n - 2 = -4n² + 6n - 2

(-n-2)•(-n-2)= n² + 2n + 2n + 4 = n² + 4n + 4