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(x-2)^2 = x^2 - 4x + 4
Dzielenie wielomianów:
x^4 - 4x^3 + 2x^2 + 8x - 8 : x^2 - 4x + 4 = x^2 - 2
-( x^4 - 4x^3 + 4x^2)
--------------------------------
==========-2x^2 + 8x - 8
- ( -2x^2 + 8x - 8)
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P(x) = (x^2-2)*(x^2-4x+4) = (x-√2)*(x+√2)*(x-2)^2
x-√2 = 0 ∨ x+√2 = 0
x = √2 ∨ x = -√2
Pozostałe pierwiastki to -√2 i √2