Réponse :
E = 16x -8y + 32x²
= 8×2x - 8y + 4×8x²
=8((2x -y + 4x²)
F = 2ab + 5a²
= 2×a×b+ 5a × a
= a (2b + 5a)
G = 9z² + 3z - 15 yz
= 3z × 3z + 3z - 3z × 5y
= 3z (3z + 1 - 5y)
H = 24z + 40z²
= 4z × 6 + 4z × 10z
= 4z (6 + 10z)
I = 25 - 50t + 75t²
= 25 - 25 × 2t + 25 × 3t²
= 25 ( 1 - 2t + 3t²)
J = 20y² + 28y
= 4y × 5y + 4y × 7
= 4y ( 5y + 7)
K = (2x + 3) (5x - 1) + (2x + 3) (x + 7)
= (2x + 3) ( 5x - 1 + x + 7)
= (2x + 3) ( 6x + 6)
