Réponses

2014-04-29T10:45:42+02:00
Développer et réduire :
A = (4x + 3)² + (4x + 3) (5x - 2)
A = (4x)² + 2×4x×3 + 3² + 4x×5x + 4x×(-2) + 3×5x + 3×(-2)
A = 16x² + 24x + 9 + 20x² - 8x + 15x - 6
A = 16x² + 20x² + 24x - 8x + 15x + 9 - 6
A = 36x² + 31x + 3

Factoriser :
A = (4x + 3)² + (4x + 3) (5x - 2)
A = (4x + 3) (4x + 3) + (4x + 3) (5x - 2)
A = (4x + 3) (4x + 3 + 5x - 2)
A = (4x + 3) (9x + 1)