Question

Rozłóż na czynniki wielomiany metodą grupowania wyrazów:

W(x) = x³ + 4x - 5

Answer 1

W(x) = x^3 + 4x - 5 = x^3 + 4x - 1 - 4 = (x^3 - 1) + (4x - 4) =

= (x-1)*( x^2 +x + 1) + 4*(x -1) = (x -1)*(x^2 + x + 1 + 4) =

= (x -1)*(x^2 + x + 5 )

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