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nekiman
@nekiman
July 2022
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3x/4+3/x-4=0 Помогите пожалуйста очень надо!
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Answers & Comments
krugly1981
3x / 4 + 3 / x - 4 = 0
3x / 4 = - 3 / x - 4
3x( x - 4) = - 3 × 4
3x² - 12x = - 12
3x² - 12x + 12 = 0
D = ( - 12)² - 4 × 3 × 12 = 144 - 144 = 0 - имеет один корень
x = - b / 2a
x = 12 / 2 × 3 = 12 / 6 = 2
Ответ: x = 2
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Answers & Comments
3x / 4 = - 3 / x - 4
3x( x - 4) = - 3 × 4
3x² - 12x = - 12
3x² - 12x + 12 = 0
D = ( - 12)² - 4 × 3 × 12 = 144 - 144 = 0 - имеет один корень
x = - b / 2a
x = 12 / 2 × 3 = 12 / 6 = 2
Ответ: x = 2