Voilà ma partie 1 vous pouvez m'aider stp exercice 1 Développer + réduire les fraction

Bonsoir,

A = 2(x - 3) + 4x - 1
A = 2x - 6 + 4x - 1
A = 6x - 7

B = 5x(x + 1) - 3x²
B = 5x² + 5x - 3x²
B = 2x² + 5x

C = (2x - 1)(x + 4)
C = 2x² + 8x - x - 4
C = 2x² + 7x - 4

D = (2x + 3)(x - 1) + 2(x + 2)
D = 2x² - 2x + 3x - 3 + 2x + 4
D = 2x² + 3x + 1

E = 7(x + 2) - 3(x + 5)
E = 7x + 14 - 3x - 15
E = 4x - 1

F = 7(x + 2) - (3x + 1)(x - 4)
F = 7x + 14 - (3x² - 12x +x - 4)
F = 7x + 14 - 3x² + 11x + 4
F = - 3x² + 18x + 18

Bonsoir,

A = 2(x - 3) + 4x - 1
A = 2x - 6 + 4x - 1
A = 6x - 7

B = 5x(x + 1) - 3x^2
B = 5x^2 + 5x - 3x^2
B = 2x^2 + 5x

C = (2x - 1)(x + 4)
C = 2x^2 + 8x - x - 4
C = 2x^2 + 7x - 4

D = (2x + 3)(x - 1) + 2(x + 2)
D = 2x^2 - 2x + 3x - 3 + 2x + 4
D = 2x^2 + 3x + 1

E = 7(x + 2) - 3(x + 5)
E = 7x + 14 - 3x - 15
E = 4x - 1

F = 7(x + 2) - (3x + 1)(x - 4)
F = 7x + 14 - (3x^2 - 12x + x - 4)
F = 7x + 14 - 3x^2 + 11x + 4
F = -3x^2 + 18x + 18