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2009-11-25T19:33:32+01:00
A)(x-2)(x+5)(2x-1)=
=(x²+5x-2x-10)(2x-1)=
=(x²+3x-10)(2x-1)=
=2x³-x²+6x²-3x-20x+10=
=2x³+5x²-23x+10

(2x-3)²(x+2)=
=( 4x²-12x+9)(x+2)=
=4x³+8x²-12x²-24x+9x+18=
=4x³-4x²-15x+18
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