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Andrearobart57
@Andrearobart57
April 2019
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S'il vous plaît c'est urgent !
1) Résoudre les équations -7x+3=0 ; -3x-5 = 4.
2)Développe: D= 3a x (-5a+9) ; E= x (-x+1) ; F= -2y (5-5y)
A=(x+5)(x+2) ; B=(3x+2)(x+3) ; C=(7x+2)(4+3x) ; D=(x-3)(x+7=
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nonotata
Verified answer
1) Résoudre les équations -7x+3=0 ; -3x-5 = 4.
-7x+3 = 0
-7x =-3
x = -3/-7
x = 3/7
-3x-5 = 4
-3x = 4+5
-3x =9
x =9/-3
x = -3
2)Développe:
D= 3a x (-5a+9)
d = -15a²+27a
; E= x (-x+1)
e = -x²+x
; F= -2y (5-5y)
f = -10y +10y²
A=(x+5)(x+2)
a = x²+2x+5x+10
a = x²+7x+10
; B=(3x+2)(x+3)
b = 3x²+9x+2x+6
b = 3x²+11x+6
; C=(7x+2)(4+3x)
c= 27x +21x²+8+6x
c = 21x²+33x+8
; D=(x-3)(x+7=
d = x²+7x-3x-21
d = x²+4x-21
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Thanks 1
winner123
Bonjour
1) - 7 x +3 = 0
-7 x = - 3
x = 3/7
- 3 x - 5 = 4
-3 x = 4 +5
- 3 x = 9
x = - 9/3 = -3
2) D = 3a x (-5a+9)
D = - 15 a² + 27 a
; E= x (-x+1) = - x² + 1
; F= -2y (5-5y) = - 10 y + 10 y²
A=(x+5)(x+2) = x ² + 2 x + 5 x + 10 =
x² + 7 x +10
B=(3x+2)(x+3) = 3 x² + 6 x + 2 x + 6 =
3 x² + 8 x + 6
8 C=(7x+2)(4+3x) = 28 x + 21 x² + 8 + 6 x =
21 x² + 34 x + 8
; D=(x-3)(x+7= x² + 7 x - 3 x - 21 =
x² + 4x - 21
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Thanks 0
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Verified answer
1) Résoudre les équations -7x+3=0 ; -3x-5 = 4.-7x+3 = 0
-7x =-3
x = -3/-7
x = 3/7
-3x-5 = 4
-3x = 4+5
-3x =9
x =9/-3
x = -3
2)Développe:
D= 3a x (-5a+9)
d = -15a²+27a
; E= x (-x+1)
e = -x²+x
; F= -2y (5-5y)
f = -10y +10y²
A=(x+5)(x+2)
a = x²+2x+5x+10
a = x²+7x+10
; B=(3x+2)(x+3)
b = 3x²+9x+2x+6
b = 3x²+11x+6
; C=(7x+2)(4+3x)
c= 27x +21x²+8+6x
c = 21x²+33x+8
; D=(x-3)(x+7=
d = x²+7x-3x-21
d = x²+4x-21
1) - 7 x +3 = 0
-7 x = - 3
x = 3/7
- 3 x - 5 = 4
-3 x = 4 +5
- 3 x = 9
x = - 9/3 = -3
2) D = 3a x (-5a+9)
D = - 15 a² + 27 a
; E= x (-x+1) = - x² + 1
; F= -2y (5-5y) = - 10 y + 10 y²
A=(x+5)(x+2) = x ² + 2 x + 5 x + 10 = x² + 7 x +10
B=(3x+2)(x+3) = 3 x² + 6 x + 2 x + 6 = 3 x² + 8 x + 6
8 C=(7x+2)(4+3x) = 28 x + 21 x² + 8 + 6 x = 21 x² + 34 x + 8
; D=(x-3)(x+7= x² + 7 x - 3 x - 21 = x² + 4x - 21