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8x²(x + 1) - 3(x + 1) = 0
(x + 1)(8x² - 3) = 0
x + 1 = 0 lub 8x² - 3 = 0
x = - 1 lub 8x² - 3 = 0
8x² - 3 = 0 (równanie kwadratowe niezupełne)
a = 8
c = - 3
a * c = 8 * (- 3) = - 24 < 0 to
x₁ = - √ (- c/a) = - √(3/8)
x₂ = √(- c/a) = √(3/8)
odp
x = - 1 lub x = - √(3/8) lub x = √(3/8)