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CLELLOUCHE90
Answered

Quel qu'un peux m'aider svp je comprends rien ??????

Pour les exercices 40 à 43, développer et réduire chaque
expression.
A = (x + 1)(x + 6) =
C = (4x + 3) (7 + 2x)=
B = (x + 4)(2 – 3x)=
D = (5x – 2)(3x + 4)=
E = (- 3x + 2)(2x - 3)=
F= (2x - 3)(- 4x – 5)=
G = (x + 3)(x + 4)=
I = (x − 3)(x – 4)=
H = (x – 3)(x + 4)=
J = (- x+3)(x – 4)=
K = (2x – 5)(3x + 7)=
M = (2x + 5)(- 3x + 7)=
L= (- 2x - 5)(3x + 7)=
N= (- 2x - 5)(-3x - 7=​

Sagot :

Bonjour,

A = (x + 1)(x + 6) = x² +6x +x +6 = x² =7x +6

C = (4x + 3) (7 + 2x)= 28x +8x²  +28 +6x = 8x²  + 34x + 28

B = (x + 4)(2 – 3x)= 2x -6x² +8 -12x = -6x² -10x +8

D = (5x – 2)(3x + 4)= 15x² +20X -6x -8 = ?

E = (- 3x + 2)(2x - 3)= -6x² +9x +4x -6 = ?

F= (2x - 3)(- 4x – 5)= -8x² -10x +3x +12 = ?

G = (x + 3)(x + 4)= x² +4x +3x +12 = ?

I = (x − 3)(x – 4)= x² -4x -3x +12 = ?

H = (x – 3)(x + 4)= x² +4x -3x -12 = ?

J = (- x+3)(x – 4)= -x² +4x +3x -12 = ?

K = (2x – 5)(3x + 7)= 6x² +14x -15x -35 = ?

M = (2x + 5)(- 3x + 7)= -6x² +14x -15x +35 = ?

L= (- 2x - 5)(3x + 7)=  -6x² -14x -15x -35  =?

N= (- 2x - 5)(-3x - 7)=​ 6x² +14x +15x +35 = ?

- *- => +

+*+ => +

- * + => -

NEPTUNEGLACE

Réponse :

Explications étape par étape

A= (x+1)(x+6)

A= [tex]x^{2}[/tex]+7x + 6

B= (x + 4)(2 – 3x)

B= -3[tex]x^{2}[/tex]-10x+8

C=(4x + 3) (7 + 2x)

C=8 + 34x + 21

D=(5x – 2)(3x + 4)

D= 15[tex]x^{2}[/tex] + 14x-8

E= (- 3x + 2)(2x - 3)

E= -6[tex]x^{2}[/tex] + 13x-6

F= (2x - 3)(- 4x – 5)

F= -8[tex]x^{2}[/tex] + 2x + 15

G= (x + 3)(x + 4)

G= [tex]x^{2}[/tex]  - 7x + 12

I=  (x − 3)(x – 4)

I= H=(x – 3)(x + 4)

H= [tex]x^{2}[/tex]- x - 12

J= (- x+3)(x – 4

J= -[tex]x^{2}[/tex] + 7x - 12

K= (2x – 5)(3x + 7)

K= 6[tex]x^{2}[/tex]-x-35

M= (2x + 5)(- 3x + 7)

M= -6[tex]x^{2}[/tex] - x + 35

L=(- 2x - 5)(3x + 7)

L= -6[tex]x^{2}[/tex] - 29x - 35

N= (- 2x - 5)(-3x - 7)

N= 6[tex]x^{2}[/tex] + 29x + 35

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