Stosując metodę wyłączania spólnego czynnika rozóż wielomian W na czynniki b) W(x)=x^2(x-1)-x+1
x^2(x-1)-1(x-1)
((x^2)-1)(x-1)
ew. (x+1)(x-1)(x-1)
W(x) =x²(x-1)-x+1=x²(x-1)-(x-1)=(x-1)(x²-1)=
=(x-1)(x-1)(x+1)
a²-b²=(a-b)(a+b)
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x^2(x-1)-1(x-1)
((x^2)-1)(x-1)
ew. (x+1)(x-1)(x-1)
W(x) =x²(x-1)-x+1=x²(x-1)-(x-1)=(x-1)(x²-1)=
=(x-1)(x-1)(x+1)
a²-b²=(a-b)(a+b)