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YatoSan204
@YatoSan204
July 2021
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решите уравнения номер 2 и 3!!
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zhenyaM2002
Verified answer
81х³ + 18х² + х = 0
х (81х² + 18х + 1) =0
х ( (9х)² + 2*9х *1 + 1²) = 0
х (9х + 1)² = 0
произведение =0, если один из множителей = 0
х₁ = 0
(9х + 1)² = 0
9х + 1 = 0
9х = -1
х
₂
= -¹/₉
x³ + 6x² - x - 6 = 0
x²(x+6) - 1(x+6) = 0
(x + 6)(x² - 1) = 0
(x +6)(x² - 1²) = 0
(x+6)(x-1)(x+1) = 0
х + 6 = 0
х₁ = - 6
х - 1 = 0
х₂ = 1
х + 1 =0
х₃ = - 1
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Answers & Comments
Verified answer
81х³ + 18х² + х = 0х (81х² + 18х + 1) =0
х ( (9х)² + 2*9х *1 + 1²) = 0
х (9х + 1)² = 0
произведение =0, если один из множителей = 0
х₁ = 0
(9х + 1)² = 0
9х + 1 = 0
9х = -1
х₂ = -¹/₉
x³ + 6x² - x - 6 = 0
x²(x+6) - 1(x+6) = 0
(x + 6)(x² - 1) = 0
(x +6)(x² - 1²) = 0
(x+6)(x-1)(x+1) = 0
х + 6 = 0
х₁ = - 6
х - 1 = 0
х₂ = 1
х + 1 =0
х₃ = - 1