Svp c pour demain
il y a deux exo
exo1
Resoudre les equation suivantes
a.(x-2)(2x-1)+(x-2)(3x-4)=0
b.(3x-2)(5x-1)-(3x-2)(3x+4)=0
c.(2x-1)² -(x-5)(2x-1)=0
exo2
On donne A=(3x+1)(x+2)-3(3x+1)
a. Developper A
b. Factioriser A
c. Resoudre l'equation: A= -1
d. Resoudre l'equation: A= 0
il y a deux exo
exo1
Resoudre les equation suivantes
a.(x-2)(2x-1)+(x-2)(3x-4)=0
b.(3x-2)(5x-1)-(3x-2)(3x+4)=0
c.(2x-1)² -(x-5)(2x-1)=0
exo2
On donne A=(3x+1)(x+2)-3(3x+1)
a. Developper A
b. Factioriser A
c. Resoudre l'equation: A= -1
d. Resoudre l'equation: A= 0
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(x-2)(2x-1+3x-4) = 0
(x-2)(5x-5) = 0
x-2 = 0 5x-5 = 0
x = 2 5x = 5
x = 1
b) (3x-2)(5x-1)-(3x-2)(3x+4) = 0
(3x-2)(5x-1-3x+4) = 0
(3x-2)(2x+3) = 0
3x-2 = 0 2x+3 = 0
3x = 2 2x = -3
x = 2/3 x = -3/2
c) (2x-1)²-(x-5)(2x-1) = 0
(2x-1) (2x-1-x-5) = 0
(2x-1) (x-6) = 0
2x-1 = 0 x-6 = 0
2x = 1 x = 6
X = 1/2
exercice 2:
a) (3x-1)(x+2) - 3(3x+1)
= 3x²-2x+5
b) (3x-1)(x+2) - 3(3x+1)
= (3x-1) (x+2-3)
= (3x-1) (x-1)
c) A=-1
(3x+1) (x+1) = -1
3x+1 = -1 x+1 = -1
3x = -1-1 x = -1-1
3x= -2 x = -2
x = -2/3
d) A= 0
(3x+1) (x+1) = 0
3x+1 = 0 x+1 = 0
3x = -1 x = -1
x = -1/3