W(x) = -1·(x+1)(x-2)(x-5) = -1·(x²-2x+x-2)(x-5) = -1·(x²-x-2)(x-5) =
-1·(x³-5x²-x²+5x-2x+10) = -x³+6x²-3x-10
W(x)=a(x+1)(x-2)(x-5)
Podstawiam a=-1
W(x)=-1(x+1)(x-2)(x-5)
W(x)=-(x²-x-2)(x-5)
W(x)=-(x³-x²-2x-5x²+5x+10)
W(x)=-(x³-6x²+3x+10)
W(x)=-x³+6x²-3x-10
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W(x) = -1·(x+1)(x-2)(x-5) = -1·(x²-2x+x-2)(x-5) = -1·(x²-x-2)(x-5) =
-1·(x³-5x²-x²+5x-2x+10) = -x³+6x²-3x-10
W(x)=a(x+1)(x-2)(x-5)
Podstawiam a=-1
W(x)=-1(x+1)(x-2)(x-5)
W(x)=-(x²-x-2)(x-5)
W(x)=-(x³-x²-2x-5x²+5x+10)
W(x)=-(x³-6x²+3x+10)
W(x)=-x³+6x²-3x-10