Odpowiedź:
W( x ) = x³ - 4 x² + x + 6
x = - 1 bo (- 1)³ - 4*( - 1)² - 1 + 6 = - 1 - 4 - 1 + 6 = 0
( x³ - 4 x² + x + 6 ) : ( x + 1) = x² - 5 x + 6
- x³ - x²
--------------
- 5 x² +x
5 x² + 5 x
------------------
6 x + 6
- 6 x - 6
-----------------
0
oraz x² - 5 x + 6 = 0
( x - 2)*(x - 3 ) = 0
x - 2 = 0 lub x - 3 = 0
x = 2 lub x = 3
Odp. x = - 1 lub x = 2 lub x = 3
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Odpowiedź:
W( x ) = x³ - 4 x² + x + 6
x = - 1 bo (- 1)³ - 4*( - 1)² - 1 + 6 = - 1 - 4 - 1 + 6 = 0
( x³ - 4 x² + x + 6 ) : ( x + 1) = x² - 5 x + 6
- x³ - x²
--------------
- 5 x² +x
5 x² + 5 x
------------------
6 x + 6
- 6 x - 6
-----------------
0
oraz x² - 5 x + 6 = 0
( x - 2)*(x - 3 ) = 0
x - 2 = 0 lub x - 3 = 0
x = 2 lub x = 3
Odp. x = - 1 lub x = 2 lub x = 3
==================================
Szczegółowe wyjaśnienie: