Bonsoir,
Factoriser les expressions:
A = (7x - 2)² + (5x - 6)(7x -2)
A = (7x -2)(7x - 2) + (5x - 6)(7x - 2)
A = (7x - 2)(7x - 2 + 5x - 6)
A = (7x - 2)(12x - 8)
A = 4(3x - 2)(7x - 2)
B = (2x - 5)(x + 10) + (2x - 5)²
B = (2x - 5)(x + 10) + (2x - 5)(2x - 5)
B = (2x - 5)(x + 10 + 2x - 5)
B = (2x - 5)(3x + 5)
Bonne soirée.