Предмет: Алгебра, автор: marrat

Помогите спроститы выраз 1) (х-7)^2-x^2 2) (1-x^2)^2+2x^2

Ответы

Автор ответа: shmatov1994

1)x²-14x+49-x²=-14x+49

2)1-2x²+x^4+2x²=1+x^4

Выбираем лучшее решение!

Автор ответа: maxsat1

то что в скобках решаем с помощью формул (а-b)^2 = a^2-2ab+b^2 1)x²-14x+49-x²=-14x+49

2)1-2x²+x^4+2x²=1+x^4

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