Răspunsuri

2014-05-24T18:06:10+03:00
(x+1)³-9x-9=(x+1)²(x+1)=(x²+2x+1)(x+1)-9x-9=x³+2x²+x+x²+2x+1=x³+3x²+3x+1-9x-9=
x²+3x²-6x-8
in dreapta
(x+1)(x+4)(x-2)=(x²+5x+4)(x-2)=x³+5x²+4x-2x²-10x-8=x³+3x²-6x-8 deci sunt egale