Réponse :
Explications étape par étape :
Exercice5: Factoriser
a) 3x + 5x = x (3 + 5) = 8x
b) (2x+1)X2 + (2x+1)X3 = (2x+1) X(2 + 3)= 5 (2x+1)
c) (2x+1)X2 + (2x+1)Xx = (2x+1) (2 + x)
d) (1-3x)(2+x) + (1-3x)(5-2x) = (1-3x) (2+x+5-2x) = (1-3x)(-x+7)
e) (2+3x)(x-1) - (x+1)(3x+2)= (3x+2)[(x-1) - (x+1) = (3x+2)(x-1-x-1) = -2(3x+2)
f) (x+1)²+(x+1)(5x-4) = (x+1)(x+1+5x-4) = (x+1)(6x-3)
Réponse :
Bonjour,
Exercice 4
a)
x² +x +2x +1 = x² +3x +1
b)
6x² +6x +2x +3 = ?
c)
10x -4x² +5 -2x=?
d)
3x -3x² -2 +2x = ?
e)
-2x² +3x -2x +3 = ?
Je te laisse faire les opérations.
Exercice 5
a)
x(3+5) = 8x
b)
(2x+1) ( 2+3) = 5(2x+1)
c)
(2x+1) ( 2+x)
d)
(1-3x) ( 2+x +5-2x) = (1-3x) (x+7)
e)
(2+3x) ( x-1 -x -1) = (2+3x) (-2) = -2( 2+3x)
f)
(x+1) ( x+1 +5x-4) = (x+1)( 6x -3)