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lilirose245633
@lilirose245633
January 2021
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Bonsoir pourriez vous m'aider à résoudre ces problèmes de mathematiques?
a) (x-1) (2x+5)
B) (-4×3x) (5x-9)
C) (-x+1) (x -1)
D) (-3-2x) (-6-3x)
E) 4-2x(3x+5)
F) (-4×3x)(x×9)
G) (3x+9)2
H) (7x-8)(4x-6)+10
Merci à vous tous
Cordialement Lili rose
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karmous
a) (x-1) (2x+5)
B) (-4×3x) (5x-9)
C) (-x+1) (x -1)
D) (-3-2x) (-6-3x)
bonsoir
E) 4-2x(3x+5)= 4-2x×3x-2x×5
=4-6x²-10x
F) (-4×3x)(x×9)=(-12x)×(9x)
=-108x²
G) (3x+9)2 =2×3x+2×9
=6x+18
H) (7x-8)(4x-6)+10 =7x×4x-7x×6-8×4x+8×6+10
=28x²-42x-32x+48+10
=28x²-74x+58
0 votes
Thanks 1
lilirose245633
Merci beaucoup vous n'avez pas réussi pour les quatre premier ??
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B) (-4×3x) (5x-9)
C) (-x+1) (x -1)
D) (-3-2x) (-6-3x)
bonsoir
E) 4-2x(3x+5)= 4-2x×3x-2x×5
=4-6x²-10x
F) (-4×3x)(x×9)=(-12x)×(9x)
=-108x²
G) (3x+9)2 =2×3x+2×9
=6x+18
H) (7x-8)(4x-6)+10 =7x×4x-7x×6-8×4x+8×6+10
=28x²-42x-32x+48+10
=28x²-74x+58