Répondre :
F = 9x²-36
= 3x²-6²
(3x +6)(3x -6)
H=7x² +7x2x2+2²
=(7x + 2)²
J = 4x² -40x +100
=2x² - 10x2x2 + 10x²
= ( 2x -10)²
G= 7x² +9x =x(7x+9)
I = x - 7x² =x(1-7x)
K=64-4x²
=8² - 2x²
(8-2x)(8+2x)
F = 9x²-36
= 3x²-6²
(3x +6)(3x -6)
H=7x² +7x2x2+2²
=(7x + 2)²
J = 4x² -40x +100
=2x² - 10x2x2 + 10x²
= ( 2x -10)²
G= 7x² +9x =x(7x+9)
I = x - 7x² =x(1-7x)
K=64-4x²
=8² - 2x²
(8-2x)(8+2x)