Odpowiedź:
W(x ) = 3 x³ - x² - 2 x = x*(3 x² - x - 2 )
3 x² - x - 2 = 0
Δ = ( - 1)² - 4*3*( - 2) = 1 + 24 = 25
√Δ = 5
x = [tex]\frac{1 - 5}{2*3} = - \frac{2}{3}[/tex] lub [tex]\frac{1 + 5}{6} =1[/tex]
więc 3 x² - x - 2 = 3*( x + [tex]\frac{2}{3} )*(x -1)[/tex]
oraz
Odp. W( x) = 3 x*( x + [tex]\frac{2}{3} )*( x - 1)[/tex]
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Odpowiedź:
W(x ) = 3 x³ - x² - 2 x = x*(3 x² - x - 2 )
3 x² - x - 2 = 0
Δ = ( - 1)² - 4*3*( - 2) = 1 + 24 = 25
√Δ = 5
x = [tex]\frac{1 - 5}{2*3} = - \frac{2}{3}[/tex] lub [tex]\frac{1 + 5}{6} =1[/tex]
więc 3 x² - x - 2 = 3*( x + [tex]\frac{2}{3} )*(x -1)[/tex]
oraz
Odp. W( x) = 3 x*( x + [tex]\frac{2}{3} )*( x - 1)[/tex]
===============================
Szczegółowe wyjaśnienie: