Răspuns :
x³+x²-x-1 x+1
-x³-x² x²-1
== -x-1
x+1
= =
x³+x²-x-1=(x+1)(x²-1)=(x+1)(x+1)(x-1)
rad.sunt: x₁=x₂=-1
x₃=1
-x³-x² x²-1
== -x-1
x+1
= =
x³+x²-x-1=(x+1)(x²-1)=(x+1)(x+1)(x-1)
rad.sunt: x₁=x₂=-1
x₃=1
(x^2)( x + 1 ) - ( x + 1 ) = ( x + 1 )( x^2 - 1 ) = ( x + 1 )( x + 1 )( x - 1 ) = ( x + 1 )^2 *
( x - 1).
Bafta !
( x - 1).
Bafta !