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Nurinika
@Nurinika
July 2022
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x^2-5x-66=0
алгебра, 8 класс.
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m11m
Verified answer
X² -5x -66=0
D=(-5)² - 4*1*(-66)=25+264=289=17²
x₁=⁽⁵⁻¹⁷⁾/₂ = ⁻¹²/₂ = -6
x₂=⁽⁵⁺¹⁷⁾/₂ = ²²/₂ = 11
Ответ: -6; 11.
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Answers & Comments
Verified answer
X² -5x -66=0D=(-5)² - 4*1*(-66)=25+264=289=17²
x₁=⁽⁵⁻¹⁷⁾/₂ = ⁻¹²/₂ = -6
x₂=⁽⁵⁺¹⁷⁾/₂ = ²²/₂ = 11
Ответ: -6; 11.