Разложите на линейные множители x^4-125x^2+484
Y = x² x⁴ - 125x² + 484 = y² - 125y + 484 = (y - 121)(y - 4) = (x² - 121)(x² - 4) = = (x - 11)(x + 11)(x - 2)(x + 2) y² - 125y + 484 = 0 D = b²-4ac = 15625 - 1936 = 117² y₁ = (-b+√D)/2a = (125+117)/2 = 121 y₂ = (-b -√D)/2a = (125-117)/2 = 4