Aidez moi svp
On me demande de factoriser les expressions
A : ( - 7x - 6 ) ( x + 5 ) + ( 8x - 9 ) ( x + 5 )
B: 5(5 - 2x ) (x + 1) + 5 ( 8x - 5 ) ( x+ 1 )
C : 6 ( x + 1 ) ( 3x - 2 ) -2 ( 2 - 5x) ( x + 1 )
D : 16(x- 1 ) au carré - 8 ( x - 1 ) ( x + 5 )
Merci
On me demande de factoriser les expressions
A : ( - 7x - 6 ) ( x + 5 ) + ( 8x - 9 ) ( x + 5 )
B: 5(5 - 2x ) (x + 1) + 5 ( 8x - 5 ) ( x+ 1 )
C : 6 ( x + 1 ) ( 3x - 2 ) -2 ( 2 - 5x) ( x + 1 )
D : 16(x- 1 ) au carré - 8 ( x - 1 ) ( x + 5 )
Merci
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Verified answer
A : ( - 7x - 6 ) ( x + 5 ) + ( 8x - 9 ) ( x + 5 )A=(x+5)(-7x-6+8x-6)
A=(x+5)(x-12)
B: 5(5 - 2x ) (x + 1) + 5 ( 8x - 5 ) ( x+ 1 )
B= 5(x+1)[(5-2x)+(8x-5)]
B= 5(x+1)(6x)
B= 3x(x+1)
C : 6 ( x + 1 ) ( 3x - 2 ) -2 ( 2 - 5x) ( x + 1 )
C= (x+1)[6(3x-2)-2(2-5x)]
C= (x+1)( 18x-12-4+10x)
C= (x+1)(28x -16)
D : 16(x- 1 )² - 8 ( x - 1 ) ( x + 5 )
D= 16(x-1)(x-1) - 8(x-1)(x+5)
D= (x+1)[ 16(x-1) - 8(x+5) ]
D= (x+1)(16x-16 -8x -40)
D= (x+1)(8x -56)