Bonjour j'aurai besoin d'aide pour ces exercices de maths. Pouvez-vous m'aider?

bonsoir

A(x) = x² + 2 x

      = x ( x + 2)

B(x) = 7 x ( x - 4) + ( x - 4)²

      = ( x - 4) ( 7 x + x - 4) = ( x - 4) ( 8 x - 4)

C (x) = ( x + 1) (2 x + 5) - ( x + 1) ( 3 x + 4)

       = ( x + 1) ( 2 x + 5 - 3 x - 4)

        = ( x + 1) ( - x + 1)

D (u) =  9 u² + 3 u = 3 u ( 3 u + 1 )

E(t) =  ( 2 - t) ( 3 t + 1) + ( 3 t + 1)

     = ( 3 t + 1) ( 2 - t + 1)

    = ( 3 t + 1) ( - t + 3)

Bonsoir,

Factoriser les expressions :

A(x) = x^2 + 2x

A(x) = x * x + 2 * x

A(x) = x(x + 2)

B(x) = 7x(x - 4) + (x - 4)^2

B(x) = 7x * (x - 4) + (x - 4) * (x - 4)

B(x) = (x - 4)(7x + x - 4)

B(x) = (x - 4)(8x - 4)

B(x) = 4(x - 4)(2x - 1)

C(x) = (x + 1)(2x + 5) - (x + 1)(3x + 4)

C(x) = (x + 1)(2x + 5 - 3x - 4)

C(x) = (x + 1)(-x + 1)

D(u)= 9u^2 + 3u

D(u) = 3u(3u + 1)

E(t) = (2 - t)(3t + 1) + (3t + 1)

E(t) = (3t + 1)(2 - t + 1)

E(t) = (3t + 1)(3 - t)

Exercice 5 :

Effectuer sans la calculatrice :

D = 48 x 99

D = 48 x (100 - 1)

D = 48 x 100 - 48 * 1

D = 4800 - 48

D = 4752

E = 57 x 101

E = 57 x (100 + 1)

E = 57 x 100 + 57 x 1

E = 5700 + 57

E = 5757

F = 101^2

F = (100 + 1)^2

F = 100^2 + 2 x 100 x 1 + 1^2

F = 10000 + 200 + 1

F = 10201