J'ai un dm de math à rendre pour demain aidez moi vite svp mercii

Bonsoir,

developper et réduire

A = x(x + 6) - x
A = x × x + x × 6 - x
A = x² + 6x - x

B = x(y - 2) + xy
B = x × y + x × (-2) + xy
B = xy - 2x + xy
B = 2xy - 2x

C = 3x(x + 4) - 6x²
C = 3x × x + 3x × 4 - 6x²
C = 3x² + 12x - 6x²
C = -3x² + 12x

D = 9x(x² - 6) + 2x²
D = 9x × x² + 9x × (-6) + 2x²
D = 9x³ - 54x + 3x²
D = 9x³ + 3x² - 54x

E = 5x(3 + 5x) + x(5 + x ) + 4x(2x + 1)
E = 15x + 25x² + 5x + x² + 8x² + 4x
E = 34x² + 24x

F = 7x(3x - 5) - 6x(8 + 7x)
F = 21x² - 35x - 48x - 42x²
F = -21x² - 83x

G = 9(3 + 9x) + 4x²(7 - 12x) - 11x(-5 + 8x)
G = 27 + 81x + 28x² - 48x³ + 55x - 88x²
G = -48x³ - 60x² + 136x + 27