Odpowiedź:
z,5
Odp. C x³ + x² - 12 x = x*(x² + x - 12 ) = x*( x + 3)*(x - 4)
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z.6
W ( x) = x²*(x² - 10 x + 15 ) - x²*(22 - 4 x ) =
= x²*( x² - 10 x + 15 - 22 + 4 x ) =
= x²*(x² - 6 x - 7 ) = x²*( x + 1)*(x - 7 )
Odp. W ( x ) = 0 ⇔ x = 0 lub x = - 1 lub x = 7
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Odpowiedź:
z,5
Odp. C x³ + x² - 12 x = x*(x² + x - 12 ) = x*( x + 3)*(x - 4)
------------------------------------------------------------------------------------
z.6
W ( x) = x²*(x² - 10 x + 15 ) - x²*(22 - 4 x ) =
= x²*( x² - 10 x + 15 - 22 + 4 x ) =
= x²*(x² - 6 x - 7 ) = x²*( x + 1)*(x - 7 )
Odp. W ( x ) = 0 ⇔ x = 0 lub x = - 1 lub x = 7
====================================================
Szczegółowe wyjaśnienie: