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babane48
@babane48
January 2021
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Aidez moi svp c'est le numéro 77
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ploup
A = 6x² + 12x +10x + 20 + 12x²+6x+20x + 10 =18x²+48x+30 B = 12x² - 8x +24x -16 +20 16x - 10x -8x² = 4x²+22x+4 C= 10x²+30x-6x-18-24x²-12x-20x-10 = −14x²−8x−28 D= -8x + 28 +10x² - 35 - 10x² +6x +20x -12 = −17x+16
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ploup
je suis dsl les retour à la ligne ne sont pas passé
jolan1
1) (3x + 5)(2x + 4) +(4x+2)(3x+5) =
6x(au carré) + 12x + 10x + 20 + 12x
(au carré) + 20 x + 6x + 10) =
18 x
(au carré)+ 48x + 30=
6 ( 3x
(au carré) + 8x +5)
2) (4x + 8)(3x -2) + (4-2x)(5+4x)=
12x
(au carré) - 8x +24x -16 + 20 + 16x -10x - 8x
(au carré))=
4x
(au carré)
+ 22x + 4 =
2(2x
(au carré) + 11x + 2)
3) (5x - 3)(2x + 6) - (6x + 5)(4x + 2) =
10x(au carré) + 30x - 6x - 18 -24x
(au carré) - 12x - 20x - 10 =
-14x
(au carré) - 8x - 28 =
-2( 7x
(au carré) +4x +14)
4) (4 - 5x)(-2x + 7) - (2x - 4)(5x - 3)=
-8x + 28 +10x(au carré) - 35x - 10x
(au carré) + 6x + 20x - 12 =
+17x +16
0 votes
Thanks 1
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6x(au carré) + 12x + 10x + 20 + 12x(au carré) + 20 x + 6x + 10) =
18 x (au carré)+ 48x + 30=
6 ( 3x(au carré) + 8x +5)
2) (4x + 8)(3x -2) + (4-2x)(5+4x)=
12x (au carré) - 8x +24x -16 + 20 + 16x -10x - 8x(au carré))=
4x(au carré) + 22x + 4 =
2(2x(au carré) + 11x + 2)
3) (5x - 3)(2x + 6) - (6x + 5)(4x + 2) =
10x(au carré) + 30x - 6x - 18 -24x(au carré) - 12x - 20x - 10 =
-14x(au carré) - 8x - 28 =
-2( 7x(au carré) +4x +14)
4) (4 - 5x)(-2x + 7) - (2x - 4)(5x - 3)=
-8x + 28 +10x(au carré) - 35x - 10x(au carré) + 6x + 20x - 12 =
+17x +16