Bonjour
Développer, réduire et ordonner les expressions suivantes.
A = (x + 3)² - (x - 2)(4x - 5)
A = x² + 6x + 9 - (4x² - 5x - 8x + 10)
A = x² + 6x + 9 - 4x² + 5x + 8x - 10
A = x² - 4x² + 6x + 5x + 8x + 9 - 10
A = - 3x² + 19x - 1
B = (4x - 1)(5x - 3) + 7(3x - 1)
B = 20x² - 12x - 5x + 3 + 21x - 7
B = 20x² - 12x - 5x + 21x + 3 - 7
B = 20x² + 4x - 4
C = 4(3x + 1)² - (2x + 3)(2x - 3)
C = 4 (9x² + 6x + 1) - (4x² - 9)
C = 36x² + 24x + 4 - 4x² + 9
C = 36x² - 4x² + 24x + 4 + 9
C = 32x² + 24x + 13
D = -3(-4x + 3) - (x - 2)(-x + 3)
D = 12x - 9 - (- x² + 3x + 2x - 6)
D = 12x - 9 + x² - 3x - 2x + 6
D = x² - 3x - 2x + 12x - 9 + 6
D = x² + 7x - 3
E = (7x - 3)(7x + 3) - (3x + 4)²
E = 49x² - 9 - (9x² + 24x + 16)
E = 49x² - 9 - 9x² - 24x - 16
E = 49x² - 9x² - 24x - 9 - 16
E = 40x² - 24x - 25.