Odpowiedź:
Szczegółowe wyjaśnienie:
Zad. 3
a)
(x - 3)(x + 6)(3x - 7) = 0
x1 = 3, x2 = - 6, x3 = 7/3
b)
x1 = - √3, x2 = √3, x3 = -3
c)
x1 = 1, x2 = 1/2
d)
x1 = 0,
x(2x² - 3x - 1) = 0
Δ = 9 + 8 = 17, √Δ = √17, x2 = (3 - √17)/4, x3 = (3 + √17)/4
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Odpowiedź:
Szczegółowe wyjaśnienie:
Zad. 3
a)
(x - 3)(x + 6)(3x - 7) = 0
x1 = 3, x2 = - 6, x3 = 7/3
b)
x1 = - √3, x2 = √3, x3 = -3
c)
x1 = 1, x2 = 1/2
d)
x1 = 0,
x(2x² - 3x - 1) = 0
Δ = 9 + 8 = 17, √Δ = √17, x2 = (3 - √17)/4, x3 = (3 + √17)/4