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Pascoka
@Pascoka
April 2019
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Re bonjour!!
qui est doué pour les expressions remarquables?
Developper et reduire les expressions suivantes
S= (8x - 4)² + 6x - x²
T= (7 - 3y) (7 + 3y) - 50
factoriser les expressions suivantes
A= (18z + 6) (5z - 1) + ( 5z - 1) (2 - 3z)
R= (11b + 4)² - (6 + 5b)²
M= 12 (9h + 1) - (9h + 1) (9 + 1h)
merci
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Verified answer
Bonjour,
faut pas etre doué, il faut apprendre comment on developpe les ir c'est tt
Developper et reduire les expressions suivantes
S= (8x - 4)² + 6x - x²
(64x²-64x+16+6x-x² =
63x²-58x+16
T= (7 - 3y) (7 + 3y) - 50
49-9y²-50=
-1-9y²
factoriser les expressions suivantes
A= (18z + 6) (5z - 1) + ( 5z - 1) (2 - 3z)
(5z-1)(18z+6+2-3z) =
(5z-1)(15z+8)
R= (11b + 4)² - (6 + 5b)²
(11b+4-6-5b)(11b+4+6+5b) =
(6b-2)(16b+10)
M= 12 (9h + 1) - (9h + 1) (9 + 1h)
(9+1h)(12-9h-1) =
(9+1h)(-9h+11)
2 votes
Thanks 1
pascoka
merci!! je connais les formules mais je me trompe en les appliquant!
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Lista de comentários
Verified answer
Bonjour,faut pas etre doué, il faut apprendre comment on developpe les ir c'est tt
Developper et reduire les expressions suivantes
S= (8x - 4)² + 6x - x²
(64x²-64x+16+6x-x² =
63x²-58x+16
T= (7 - 3y) (7 + 3y) - 50
49-9y²-50=
-1-9y²
factoriser les expressions suivantes
A= (18z + 6) (5z - 1) + ( 5z - 1) (2 - 3z)
(5z-1)(18z+6+2-3z) =
(5z-1)(15z+8)
R= (11b + 4)² - (6 + 5b)²
(11b+4-6-5b)(11b+4+6+5b) =
(6b-2)(16b+10)
M= 12 (9h + 1) - (9h + 1) (9 + 1h)
(9+1h)(12-9h-1) =
(9+1h)(-9h+11)