AIDEZ MOI SVP :( Factoriser : F= 6x²- 3x G= -3x² - 3ax H= 9x² + 6x +1 I= 16x² - 25 J= (x+2)² -x²

F=3X(2X-1)
G=3X(-X-a)
H=(3X+1)²
I=(4X-5)(4X+5)
J=2*(2X+2)

F= 6X² - 3X =3X x 2X - 3X x 1
  = 3X(2X-1)
G= -3X² -3aX = -3X x X - 3X x a
  = -3X(X - a)
H= 9X² + 6X +1 = 3²X² + 2 x 3X x 1 + 1²
  = (3X)² + 2 x 3X x 1 + 1² = (3X + 1)²
I= 16X² - 25 = 4² X² - 5² = (4X)² -5²
  = (4X -5)(4X + 5)
J= (X + 2)² - X² = (X + 2 - X)(X + 2 +X)
  = 2(2X +2)