philippekalvin
Answered

Exercice 2:
Applique la règle de suppression des parenthèses, puis simplifie et réduis les expressions suivantes.
A = 3x - (5x + 4)
D=2-7x² - (-3x + 7 +5x²)
B = 2 (7x)
E = 10x + 8x² + (7 - 10x + 5) - (3x² + 3)
F = 10 (x + 7) - (-5x + 5)
= (4x + 3) - (5 - 4x)
C =

Sagot :

mariejoe57

Réponse :

bonjour

Explications étape par étape :

A = 3x - (5x + 4)

=3x-5x-4

=-2x-4

D=2-7x² - (-3x + 7 +5x²)

=2-7x+3x-7-5x²

=-5x²-4x-5

B = 2 (7x)

=14x

E = 10x + 8x² + (7 - 10x + 5) - (3x² + 3)

=10x + 8x²+7 -10x + 5 - 3x²-3

=3x²+9

F = 10 (x + 7) - (-5x + 5)

=10x+77 - 5x -5

=5x +72

= (4x + 3) - (5 - 4x)

=4x+3-5+4x

=8x-2

Bonjour!!

A = 3x - (5x + 4)

=3x -5x +4

= -2x +4

D=2-7x² - (-3x + 7 +5x²)

= 2-7x² +3x -7 -5x²

= -12x² +3x -5

B = 2 (7x)

= 2*7x

= 14x

E = 10x + 8x² + (7 - 10x + 5) - (3x² + 3)

= 10x+8x² +7-10x +5 -3x² -3

= 5x² +9

F = 10 (x + 7) - (-5x + 5)

= 10x +70 +5x -5

= 15x +65

C= (4x + 3) - (5 - 4x)

= 4x +3 -5 +4x

= 8x -2