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7. (99-7-23) Agar \[ x^{2}+2 x+1=0 \] tenglamaning ildizlari \( x_{1} \) va \( x_{2} \) bo'lsa, \( x_{1}^{3}-x_{2}^{3} \mathrm{ni} \) hisoblang.

Ask by Guerrero Maxwell. in Uzbekistan
Feb 25,2025

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Answer

\( x_{1}^{3} - x_{2}^{3} = 0 \)

Solution

Мы имеем уравнение   x² + 2x + 1 = 0. Заметим, что его можно переписать как   (x + 1)² = 0, откуда следует, что оба корня равны:   x₁ = x₂ = -1. Теперь вычислим разность кубов корней:   x₁³ − x₂³ = (–1)³ − (–1)³ = –1 − (–1) = 0. Ответ: 0.

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Tenglama \( x^2 + 2x + 1 = 0 \) ni yechganimizda, uni (\(x + 1\))^2 = 0 ko'rinishida yozish mumkin. Bu yerda, ildizlar \( x_1 = -1 \) va \( x_2 = -1 \) bo'ladi. Ildizlar teng bo'lgani sababli, \( x_1^3 - x_2^3 = -1^3 - (-1)^3 = -1 + 1 = 0 \). Demak, \( x_1^3 - x_2^3 = 0 \).

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