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x(x-1)(x-2)(x-3)=0
x=0 v x=1 v x=2 v x=3
=(2x+10)(x+3)(x²-10x+24)=(2x²+16x+30)(x²-10x+24)=
=[tex]2x^{4}[\tex]-20x³+48x²+16x³-160x²+384x+30x²-300x+720=
=[tex]2x^{4}[\tex]-4x³-82x²+720