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développer et réduire si possible
A= 5(2a+3) + 3 (4a+2 )
B=6(2b-4) - 3 ( 4 - 5b)
C=(3c + 5 )+ (4c - 8 )
D=(2d - 7 ) - ( 4d + 3 )
E=(4x + 2)(3x+5)
F=(4x + 5 )(3x+4)
G=(-8x + 3 ) (4x - 4 )
H=(3 x - 5 ) ( 3x - 5 )
développer et réduire si possible
A= 5(2a+3) + 3 (4a+2 )
B=6(2b-4) - 3 ( 4 - 5b)
C=(3c + 5 )+ (4c - 8 )
D=(2d - 7 ) - ( 4d + 3 )
E=(4x + 2)(3x+5)
F=(4x + 5 )(3x+4)
G=(-8x + 3 ) (4x - 4 )
H=(3 x - 5 ) ( 3x - 5 )
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A= 10a+15 +12a+6 = 22a + 21
B = 12b - 24 -12 +15b = 27b - 36
C = 3c+5+4c-8 = 7c - 3
D = 2d-7-4d-3= -2d -10
E = 12x² + 20x +6x +10 = 12x²+26x+10
F= 12x² + 16x +15x +20 = 12x²+31x + 20
G = -32x² +32x +12x -12 = -32x²+44x-12
H = 9x²-15x -15x +25 = 9x²-30x+25