Sagot :
Bonjour
(x+5)²+(x+5)=
(x+5)(x+5) +( x+5 )=
(x+5) (x+5 +1)=
(x+5)( x+6)
( x+5 ) devient 1 lors de la factorisation:
(x+5) *1 = x+5
bjr
(x + 5)² + (x + 5) = (x + 5)(x + 5) + (x + 5) ( a² = a * a )
= (x + 5)(x + 5) + (x + 5) *1 (facteur commun (x + 5) )
= (x + 5)(x + 5) + (x + 5) *1
= (x + 5) ( x + 5 + 1)
= (x + 5)(x + 6)