Bonsoir,
A= x(9+11x -7x²)
B= (x+10) ( 5x-1 -3+2x)
= (x+10) ( 7x -4)
C= (3x-1) ( 8 +3x -1)
=(3x-1) ( 3x +7)
D= (5x+8)²
identité remarquable
E= (9-9x+1) ( 9 +9x-1)
= ( -9x +10) ( 9x +8)
IR
F= (5x+3-4x+1) ( 5x+3 + 4x-1)
= (x +4) ( 9x +2)
IR
G= (4x+3) ( -8 +3x+1)
= (4x+3) ( 3x -7)
