Question

плиз помогите очень надо

Answer 1

(a^3-b^3)+ab(a-b) =
(a-b)(a²+ab+b²)+ab(a-b)=
(a-b)(a²+ab+b²+ab)=
(a-b)(a²+2ab+b²)=
(a-b)(a+b)²=(a-b)(a+b)(a+b)=
(7.82-2.18)(7.82+2.18)(7.82 +2.18)=5.64*10*10=564