Odpowiedzi

2009-11-30T20:16:51+01:00
(2x+5)²=
=2x²+20x²+25=
=22x²+25=47x²

(x-1)(x³+x²+x+1)=
=x-1+x³-x²-x-1=
=x-1
=-1x

(x+)(x³-2²+x-1)=
=x+1+x³-4+x-1
=x³-4
=-4x³
1 5 1