Répondre :
Développement :
a. \( E = 3(x+4) = 3x + 12 \)
b. \( F = x(x-4) = x^2 - 4x \)
c. \( G = 2x(x+3) = 2x^2 + 6x \)
d. \( H = 2(x - 3) + 5x = 2x - 6 + 5x = 7x - 6 \)
Factorisation :
e. \( I = 3x + 6 = 3(x + 2) \)
f. \( J = x^2 - 2x = x(x - 2) \)
g. \( K = 5x + 5 = 5(x + 1) \)
a. \( E = 3(x+4) = 3x + 12 \)
b. \( F = x(x-4) = x^2 - 4x \)
c. \( G = 2x(x+3) = 2x^2 + 6x \)
d. \( H = 2(x - 3) + 5x = 2x - 6 + 5x = 7x - 6 \)
Factorisation :
e. \( I = 3x + 6 = 3(x + 2) \)
f. \( J = x^2 - 2x = x(x - 2) \)
g. \( K = 5x + 5 = 5(x + 1) \)