Odpowiedź:
1.
x³ +2 x² -3 x = 0
x*(x²+ 2 x - 3) = 0
x*( x + 3)*(x - 1) = 0
x = 0 lub x + 3 = 0 lub x - 1 = 0
x = 0 lub x = - 3 lub x = 1
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2.
x³ + x² - 4 x - 4 = 0
x²*( x + 1) - 4*( x + 1) = 0
( x + 1)*( x² - 4) = 0
( x + 1)*( x - 2)*( x + 2) = 0
x + 1 = 0 lub x - 2 = 0 lub x + 2 = 0
x = - 1 lub x = 2 lub x = - 2
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Odpowiedź:
1.
x³ +2 x² -3 x = 0
x*(x²+ 2 x - 3) = 0
x*( x + 3)*(x - 1) = 0
x = 0 lub x + 3 = 0 lub x - 1 = 0
x = 0 lub x = - 3 lub x = 1
===============================
2.
x³ + x² - 4 x - 4 = 0
x²*( x + 1) - 4*( x + 1) = 0
( x + 1)*( x² - 4) = 0
( x + 1)*( x - 2)*( x + 2) = 0
x + 1 = 0 lub x - 2 = 0 lub x + 2 = 0
x = - 1 lub x = 2 lub x = - 2
====================================
Szczegółowe wyjaśnienie: