Question

(a-1)(a^2+ a +1)-a^2(a-8) при a=²₉ (две девятые,дробь)

Answer 1

(a-1)(a^2+ a +1)-a^2(a-8) =  а³ - 1 - а³ + 8а² = 8а² - 1

При а = 2/9 получим:

8а² - 1 = 32/81  - 1 = - 49/81  

Answer 2

Для начала, давайте подставим значение a=²₉ (две девятые) в выражение (a-1)(a^2+a+1)-a^2(a-8) и вычислим его поэтапно.

Подстановка значения a=²₉

Подставим значение a=²₉ в выражение: (a-1)(a^2+a+1)-a^2(a-8)

Вычисление (a-1) и (a-8)

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