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alicialathug
@alicialathug
January 2021
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Aider moi svp
Ex 8 : on me demander de développer et de réduire les expressions :
C : 4( 7x + 5 au carré ) + 4 ( 2x - 1 )( 7x + 5 )
Ex 9 : développer et réduire les expressions
A : ( 4x + 4) au carré - ( -x -3) (5x - 4)
B: ( 2x + 4 ) ( 2x + 5 ) + ( 9x - 6) au carré
C: ( 5x - 4 ) ( 5x + 4 ) - ( 6x - 3 ) au carré
D: ( 3x - 7 ) au carré - ( 10x + 8) au carré
Merci
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maudmarine
Verified answer
Bonjour,
Ex 8 :
Développer et de réduire les expressions
:
C : 4( 7x + 5²) + 4 ( 2x - 1 )( 7x + 5 )
C = 4 (7x + 25) + 4 (14x² + 10x - 7x - 5)
C = 28x + 100 + 56x² + 40x - 28x - 20
C = 56x² + 40x + 80
Ex 9 :
Développer et réduire les expressions
A : ( 4x + 4)² - ( -x -3) (5x - 4)
A = 16x² + 32x + 16 - (- 5x² + 4x - 15x + 12)
A = 16x² + 32x + 16 + 5x² - 4x + 15x - 12
A = 21x² + 43x + 4
B: ( 2x + 4 ) ( 2x + 5 ) + ( 9x - 6)²
B = 4x² + 10x - 8x + 20 + 81x² - 126x + 36
B = 85x² - 124x + 56
C: ( 5x - 4 ) ( 5x + 4 ) - ( 6x - 3 )²
C = 25x² + 20x - 20x - 16 - (36x² - 36x + 9)
C = 25x² - 16 - 36x² + 36x - 9
C = 11x² + 36x - 25
D: ( 3x - 7 )² - ( 10x + 8)²
D = 9x² - 42x + 49 - (100x² + 160x + 64)
D = 9x
²
- 42x + 49 - 100x² - 160x - 64
D = - 91x² - 202x - 15
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Aidez moi svp 3x - 5 = 18 35 + 4x = 7 - 3x 6x - ( x- 4 ) = 20 3x + 4 ( 1 - 2x) = 7 - 8x 14 - 2 ( -3x + 9 ) = 4 ( 2x - 7 ) -1 Merci
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Aider moi svp : a: 3x -5 = 18 b: 20 - 8x =13 c: 35+4x = 7 d: 1000x + 150 = 30 e: 6x - ( x - 4 ) = 20 f: 3- ( 2x + 1 ) = 5x - 4 g : 3x + 4 ( 1-2x) = 7 - 8x h: 14 - 2 ( -3x + 9 ) = 4(2x - 7 ) -1 i : 7y + 11 =-9 j: 3y - 5 = y - 7 k: 8- 4x = x+ 48 Merci
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Bonjour,Ex 8 : Développer et de réduire les expressions :
C : 4( 7x + 5²) + 4 ( 2x - 1 )( 7x + 5 )
C = 4 (7x + 25) + 4 (14x² + 10x - 7x - 5)
C = 28x + 100 + 56x² + 40x - 28x - 20
C = 56x² + 40x + 80
Ex 9 : Développer et réduire les expressions
A : ( 4x + 4)² - ( -x -3) (5x - 4)
A = 16x² + 32x + 16 - (- 5x² + 4x - 15x + 12)
A = 16x² + 32x + 16 + 5x² - 4x + 15x - 12
A = 21x² + 43x + 4
B: ( 2x + 4 ) ( 2x + 5 ) + ( 9x - 6)²
B = 4x² + 10x - 8x + 20 + 81x² - 126x + 36
B = 85x² - 124x + 56
C: ( 5x - 4 ) ( 5x + 4 ) - ( 6x - 3 )²
C = 25x² + 20x - 20x - 16 - (36x² - 36x + 9)
C = 25x² - 16 - 36x² + 36x - 9
C = 11x² + 36x - 25
D: ( 3x - 7 )² - ( 10x + 8)²
D = 9x² - 42x + 49 - (100x² + 160x + 64)
D = 9x² - 42x + 49 - 100x² - 160x - 64
D = - 91x² - 202x - 15