Предмет: Алгебра, автор: emiliashynarovska

Спростіть вираз (х+3)(х-3)+(4-x) х - 3х і знайдіть його значення, якщо x=19.

Ответы

Автор ответа: ananasikuwu30

0

Ответ:

-10+x y-3x

Объяснение:

x²-9+x y-x²-3x-1

Автор ответа: wieslawlozickip5w1nd

1

Ответ:

Объяснение:

(х+3)(х-3)+(4-x) х - 3х=x²-9+4x-x²-3x=x-9

x-9=19-9=10 якщо x=19

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