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Mimi000
@Mimi000
April 2019
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58-65-133 svp merci !! C'est pour demain !!!!!!!!!!!
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winner123
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Bonsoir
N°58
A = a + b +10
A = -5 +2 +10 =
7
b = 2a +10 = 10 +10 =
20
c = ab + b = -10+ 2 =
-8
d = a² - b² = 10 -4 =
6
N°65
a) 8 +a+b -5 =
a +b +3
b) 2 -3x +4 =
-3x + 6
c) 5a + 3 +4 =
5a + 7
d) -4a -5b -2a -b =
-6a - 6b
e) 3x -6 + x +6 =
4x
N°133
a) x² + 7x +7x +49 =
x² +14x +49
b) x² -2x -2x +4 =
x² -4x + 4
c) (x +7)² + (x-2)² = x² + 14x +49 + x² - 4x +4 =
2x² + 10x + 53
d) (x+7)² - (x-2)² = (x+7 +x -2)(x+7 -x+2) = (2x +5)( 9) =
18x + 45
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Verified answer
BonsoirN°58
A = a + b +10
A = -5 +2 +10 = 7
b = 2a +10 = 10 +10 = 20
c = ab + b = -10+ 2 = -8
d = a² - b² = 10 -4 = 6
N°65
a) 8 +a+b -5 = a +b +3
b) 2 -3x +4 = -3x + 6
c) 5a + 3 +4 = 5a + 7
d) -4a -5b -2a -b = -6a - 6b
e) 3x -6 + x +6 = 4x
N°133
a) x² + 7x +7x +49 = x² +14x +49
b) x² -2x -2x +4 = x² -4x + 4
c) (x +7)² + (x-2)² = x² + 14x +49 + x² - 4x +4 = 2x² + 10x + 53
d) (x+7)² - (x-2)² = (x+7 +x -2)(x+7 -x+2) = (2x +5)( 9) = 18x + 45