Решение и ответ:
7x² - 7 = 0
7x² = 7
x² = 7 ÷ 7
x² = 1
x = ±√1
x₁ = 1
x₂ = -1
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Решение и ответ:
7x² - 7 = 0
7x² = 7
x² = 7 ÷ 7
x² = 1
x = ±√1
x₁ = 1
x₂ = -1