Ответы на вопрос:
Решение 1) (x+3)(x-4)=-12 x² - x - 12 = - 12 x(x - 1) = 0 x₁ = 0 x₂ = 1 ответ: х₁ = 0 : х₂ = 1 2) (3x-1)^2=13x - 1 = - 1 3x = 0 x₁ = 0 3x - 1 = 1 3x = 2x₂ = 2/3 ответ: х₁ = 0; х₂ = 2/3 3) (2x+3)(3x+1)=11x+306x² + 11x + 3 = 11x + 30 6x² = 27 x² = 9/2 x₁ = - 3√2/2 x₂ = 3√2/2 ответ: x₁ = - 3√2/2; x₂ = 3√2/2 4) 18-(x-5)(x-4)=-2x² - 9x + 20 = 20 x(x - 9) = 0x₁ = 0 x₂ = 9 ответ: x₁ = 0 ; x₂ = 9 5) 5x+(2x+1)(x-3)=05x + 2x² - 5x - 3 = 0 2x² - 3 = 0 2x² = 3 x² = 3/2 x₁ = - √6/3 x₂ = √6/3 6) x^2-5=(x-5)(2x-1)x² - 5 = 2x² - 11x + 5 x² - 11x + 10 = 0 x₁ = 1 x₂ = 10 ответ: x₁ = 1 ; x₂ = 10
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