Bonjour,
Développe puis réduis chaque expression.
G = x(x + 6) – X
G = x² + 6x - X
G = x² + 5x
1 = 3x(x + 4) – 6x2
1 = 3x² + 3x × 4 - 6x²
1 = 3x² + 12x -6x²
1 = -3x² + 12x
H = x(y – 2) + xy
H = xy - 2x + xy
H = 2xy - 2x
J = 9x(x2 – 6) + 2x2
J = 9x³ - 54x + 2x²
J = 9x² + 2x² - 54
K = 5x(3 + 5x) + x(5 + x) + 4x(2x + 1)
K = 5x × 3 + 5x × 5x + 5x + x² + 4x × 2x + 4x × 1
K = 15x + 25x² + 5x + x² + 8x² + 4x
K = 34x² + 24x
