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loicromain
@loicromain
June 2021
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6,7,8 svp repondez nous vite c'est urgent
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winner123
Verified answer
Bonjour
Exercice 7
a = 9 x² - 2 x - 13
b = - 2 x² + 4 x + 10
c = 3 x - 7 x² + 6 x - 2
c = - 7 x² + 9 x - 2
d = 1 + x + 3 = x + 4
exercice 6
a) x + x = 2 x
b) a² + a = a ³
c) 2 t - 1 + t = 3 t - 1
d) x² + 4 x = x ² +4 x
e) b ( b + 1) = b² + b
f) 2 x - 3 x = - x
g) 2 t² +3 t² = 5 t²
h) 2 x + 3 x = 5 x
Exercice 8
Aire ABCD = ( x +5) ( 3 + x) = 3 x + x² + 15 + 5 x
= x² + 8 x + 15
Aire AMOQ = x²
Aire QOPD = 3 x
Aire MO.. = 5 x on ne voit pas les autres points
Aire O P = 15
x² + 3 x + 5 x + 15 = x² + 8 x + 15
0 votes
Thanks 1
loicromain
mrc
maudmarine
Verified answer
6)
a) Juste
b) Faux - Résultat : a² + a
c) Juste
d) Faux - Résultat : x² + 4x
e) Faux - Résultat : b² + b
f) Faux - Résultat : - x
g) Faux - Résultat : 5t²
h) Faux - Résultat : 5x
7)
a) 7x² + 3x - 10 + 2x² - 5x - 3
= 7x² + 2x² + 3x - 5x - 10 - 3
= 9x² - 2x - 13
b) 7 + (4x + 3 - 2x²)
= 7 + 4x + 3 - 2x²
= - 2x² + 4x + 7 + 3
= - 2x² + 4x + 10
c) 3x - (7x² - 6x + 2)
= 3x - 7x² + 6x - 2
= - 7x² + 3x + 6x - 2
= - 7x² + 9x - 2
d) 1 - (- x + 2)
= 1 + x - 3
= x + 1 - 3
= x - 2
8)
(x + 3) * (x + 5)
ou
(5 + x) * (3 + x)
On ne voit pas toutes les mesures
b)
(x + 3) * (x + 5) = x² + 5x + 3x + 15 = x² + 8x + 15
(5 + x) * (3 + x) = 15 + 5x + 3x + x² = x² + 8x + 15
1 votes
Thanks 1
quentinclarisse
n°7
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Lista de comentários
Verified answer
BonjourExercice 7
a = 9 x² - 2 x - 13
b = - 2 x² + 4 x + 10
c = 3 x - 7 x² + 6 x - 2
c = - 7 x² + 9 x - 2
d = 1 + x + 3 = x + 4
exercice 6
a) x + x = 2 x
b) a² + a = a ³
c) 2 t - 1 + t = 3 t - 1
d) x² + 4 x = x ² +4 x
e) b ( b + 1) = b² + b
f) 2 x - 3 x = - x
g) 2 t² +3 t² = 5 t²
h) 2 x + 3 x = 5 x
Exercice 8
Aire ABCD = ( x +5) ( 3 + x) = 3 x + x² + 15 + 5 x
= x² + 8 x + 15
Aire AMOQ = x²
Aire QOPD = 3 x
Aire MO.. = 5 x on ne voit pas les autres points
Aire O P = 15
x² + 3 x + 5 x + 15 = x² + 8 x + 15
Verified answer
6)a) Juste
b) Faux - Résultat : a² + a
c) Juste
d) Faux - Résultat : x² + 4x
e) Faux - Résultat : b² + b
f) Faux - Résultat : - x
g) Faux - Résultat : 5t²
h) Faux - Résultat : 5x
7)
a) 7x² + 3x - 10 + 2x² - 5x - 3
= 7x² + 2x² + 3x - 5x - 10 - 3
= 9x² - 2x - 13
b) 7 + (4x + 3 - 2x²)
= 7 + 4x + 3 - 2x²
= - 2x² + 4x + 7 + 3
= - 2x² + 4x + 10
c) 3x - (7x² - 6x + 2)
= 3x - 7x² + 6x - 2
= - 7x² + 3x + 6x - 2
= - 7x² + 9x - 2
d) 1 - (- x + 2)
= 1 + x - 3
= x + 1 - 3
= x - 2
8)
(x + 3) * (x + 5)
ou
(5 + x) * (3 + x)
On ne voit pas toutes les mesures
b)
(x + 3) * (x + 5) = x² + 5x + 3x + 15 = x² + 8x + 15
(5 + x) * (3 + x) = 15 + 5x + 3x + x² = x² + 8x + 15