Bonjour,
Factoriser:
A = (x + 3)(x - 1) + 2x + 6
A= (x+3)(x-1)+2(x+3)
A= (x+3)(x-1+2)
A= (x+3)(x+1)
B=3x2 + 2x + (3x + 2)2
B= 3x²+2x+(3x+2)²
B= x(3x+2)+(3x+2)(3x+2)
B= (3x+2)(x+3x+2)
B= (3x+2)(4x+2)
B= 2(3x+2)(2x+1)
C = 2(x - 3)2 - 8
C= 2( (x-3)² -4)
C= 2( (x-3)² - 2²)
C= 2(x-3-2)(x-3+2)
C= 2(x-5)(x-1)
D=(4x + 3)2 - 4x - 3
D= (4x+3)(4x+3) - (4x+3)
D= (4x+3)(4x+3 - 1)
D= (4x+3)(4x+2)
D= 2 (4x+3)(2x+1)