rozloz wielomian na czynniki : W(x)=-x^+4
W(x)=-x²+4 = 4-x² = (2-x)(2+x)
-x²+4= - (x²-4)=-(x+2)(x-2)
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W(x)=-x²+4 = 4-x² = (2-x)(2+x)
-x²+4= - (x²-4)=-(x+2)(x-2)