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W(x)=(x-3)(x+3)(2x+3)(1-x)
x=3 lub x=-3 lub x=-3/2 lub x=1
i
2x+3=0
i
1-x =0
(x-3)(x+3)=0
i
2x=-3
i
x=1
zatem x₁ =3, x₂=-3, x₃= -1,5 x₄= 1
X=3 lub x=-3 lub x=-3/2 lub x=1