Bonjour,
Développer les expressions:
A= 3x(2x-1)-(x²-7)
A= 6x²-3x-x²+7
A= 5x²-3x+7
B= (2x-5)(-3x+1)
B= -6x²+15x+2x-5
B= -6x²+17x-5
Factoriser les expressions:
C= 12x²-8x
C= 4x(3x-2)
D= (x-3)(-3x+1)-(x-3)(x-2)
D= (x-3)(-3x+1-x+2)
D= (x-3)(-4x+3)
D= - (x-3)(4x-3)