Sagot :
Bonjour,
B= (2x+8)(3x-10)
B= 6x²+24x-20x-80
B= 6x²+4x-80
C= (x+3)(2x-5)-(2x-5)(3x+7)
C= 2x²+6x-5x-15- (6x²-15x+14x-35)
C= 2x²+x-15-6x²+x+35
C= - 4x²+2x+20
Bonjour,
B= (2x+8)(3x-10)
B= 6x²+24x-20x-80
B= 6x²+4x-80
C= (x+3)(2x-5)-(2x-5)(3x+7)
C= 2x²+6x-5x-15- (6x²-15x+14x-35)
C= 2x²+x-15-6x²+x+35
C= - 4x²+2x+20