Question

1)Descompuneti in factori, grupand convenabil termeni :
X la puterea a 3 a + 3x la putearea a 2 a -x-3

Answer 1

$x^{3} + 3 x^{2}-x- 3= x^{3} -x+3 x^{2} -3=x( x^{2} -1)+3( x^{2} -1)=$
$( x^{2} -1)(x+3)$