Ответы 1
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81x⁴ + 1 =
= (81x⁴ + 2·9x²·1 + 1) - 18x² =
= (9x²+ 1)² - 18x² =
= (9x²+ 1)² - (3x√2)² =
= (9x²+ 1 - 3x√2) · (9x²+ 1 + 3x√2)
Но если в условии минус, тогда решение иное:
81x⁴ - 1 =
= (9x²)² - 1² =
=(9х²- 1)·(9х²+ 1) =
= (3х-1)(3х+1)(9х²+ 1)
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Автор:
jamarcusio7y - 5 лет назад
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