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Exercice n°3
J’ai cette exercice : Développe et réduis les
expressions suivantes :
A= (a + 1)2
B = (5x + 2)2
C = (3y - 4)2 + 3( a -6)
D=3(x + 1)(x – 5)
E = (-3-1)(t - 7)

Sagot :

HAMELCHRISTOPHE

Réponse :

A= (a + 1)² = a² + 2a + 1

B = (5x + 2)² = 25x² + 20x  + 4

C = (3y - 4)² + 3( a -6) = 9y² -24y + 16 + 3a -18

C = 9y² - 24y + 3a -2

D=3(x + 1)(x – 5) = 3(x² -5x +x -5)

D= 3x² -12x - 15

E = (-3-1)(t - 7 )= -4(t-7)

E = -4t+28

j'espère avoir aidé

INEQUATION

Bonsoir,,

Développer:

A= (a + 1)²= a²+a+a+1= a²+2a+1

B = (5x + 2)²= 25x²+10x+10x+4= 25x²+20x+4

C = (3y - 4)² + 3( a -6)= 9y²-12y-12y+16+3a-18= 3a+9y²-24y-2

D=3(x + 1)(x – 5)= 3(x²+x-5x-5)= 3x²-12x-15

E = (-3-1)(t - 7)= -4(t-7)= -4t+28

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