Răspunsuri

2014-01-24T17:16:11+02:00
=4(x²+2x+1)-(2²-4x+x²)
=4x²+8x+4-4+4x-x²=
=3x²+12x
=3x(x+4)
2014-01-24T17:16:24+02:00
4(x²+2x+1)-(4-4x+x²) = 4x²+8x+4-4+4x-x²) = 3x²+12x =3x(x+4)