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[2x³-4x+8-(x³+5x²-4x-3x²-15x+12)](3-2x)=
=[2x³-4x+8-(x³+2x²-19x+12)](3-2x)=
=(2x³-4x+8-x³-2x²+19x-12)(3-2x)=
=-2x⁴+7x³-36x²+53x-12
chyba jakoś tak ;]
[2X³-4x+8 -(x³+5x³-4x-3x²+15x+12)]razy(3-2x)
[2X³-4x+8 -x³-5x³+4x+3x²-15x-12) razy(3-2x)
[4x³-5x²-15x-4] razy(3-2x)
12x³-15x²-24x-12-8x⁴+10x³+30x³+8x
32x³+15x²-37x-8x⁴-12