Rozwiąż równanie x3+x2-9x-9=0
Metoda Grupowania :
x³ + x² - 9x - 9 = 0
x²(x+1) - 9(x+1) = 0
(x²-9)(x+1) = 0
(x-3)(x+3)(x+1) = 0
x = 3 lub x = -1 lub x = -3
x³+x²-9x-9=0
x²(x+1)-9(x+1)=0
(x+1)(x²-9)=0
(x+1)(x+3)(x-3)=0
x+1=0 lub x+3=0 lub x-3=0
x=-1 lub x=-3 lub x=3
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Metoda Grupowania :
x³ + x² - 9x - 9 = 0
x²(x+1) - 9(x+1) = 0
(x²-9)(x+1) = 0
(x-3)(x+3)(x+1) = 0
x = 3 lub x = -1 lub x = -3
x³+x²-9x-9=0
x²(x+1)-9(x+1)=0
(x+1)(x²-9)=0
(x+1)(x+3)(x-3)=0
x+1=0 lub x+3=0 lub x-3=0
x=-1 lub x=-3 lub x=3