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bobo2662
@bobo2662
July 2022
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(x-4)куб-x(x квадрат+39)= -54-10x квадрат
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kolobok1431
(х-4)³ - х(х² + 39) = - 54 - 10х²
х³ - 3·х²·4 + 3·х·4² - 4³ - х³ - 39х = - 54 - 10х²
- 12х² + 48х - 64 - 39х + 54 + 10х² = 0
- 2х² + 9х - 10 = 0
2х² - 9х + 10 = 0
D = b² - 4ac
D = 81 - 4·2·10 = 81 - 80 = 1
√D = √1 = 1
x₁ =(9 - 1)/4 = 2
x₂ = (9 + 1)/4 = 10/4 = 2,5
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Answers & Comments
х³ - 3·х²·4 + 3·х·4² - 4³ - х³ - 39х = - 54 - 10х²
- 12х² + 48х - 64 - 39х + 54 + 10х² = 0
- 2х² + 9х - 10 = 0
2х² - 9х + 10 = 0
D = b² - 4ac
D = 81 - 4·2·10 = 81 - 80 = 1
√D = √1 = 1
x₁ =(9 - 1)/4 = 2
x₂ = (9 + 1)/4 = 10/4 = 2,5