Bonjour
Développer et réduire les expressions suivantes :
C = (8y + 3) (5y + 7) - 3 (8y + 3) (2y - 1)
C = 40y² + 56y + 15y + 21 - 3 (16y² - 8y + 6y - 3)
C = 40y² + 56y + 15y + 21 - 48y² - 24y - 18y + 9
C = 40y² - 48y² + 56y + 15y - 24y - 18y + 21 + 9
C = - 8y² + 19y + 30
D = (2x + 3)² + (x - 2) (2x + 3)
D = 4x² + 12x + 9 + 2x² + 3x - 4x - 6
D = 4x²+ 2x² + 12x + 3x - 4x + 9 - 6
D = 6x² + 11x + 3
E = (2t - 7) - (5t + 2) (2t - 7)
E = 2t - 7 - (10t² - 35t + 4t - 14)
E = 2t - 7 - 10t² + 35t - 4t + 14
E = - 10t² + 2t + 35t - 4t - 7 + 14
E = - 10t² + 33t + 7
F = 2y² - y (4y - 7)
F = 2y² - 4y² + 7y
F = - 2y² + 7y
G = (2t - 5)² + (2t - 5) (x - 1) + 2t
G = 4t² - 20t + 25 + 2tx - 2t - 5x + 5 + 2t
G = 4t² - 20t - 2t + 2t + 2tx - 5x + 25 + 5
G = 4t² - 20t + 2tx - 5x + 30
I = déjà développé
J = (3 - 2x)² - 4
J = 9 - 12x + 4x² - 4
J = 4x² - 12x + 5
K = (x - 4)² - (2x - 1)²
K = x² - 8x + 16 - (4x² - 4x + 1)
K = x² - 8x + 16 - 4x² + 4x - 1
K = x² - 4x² - 8x + 4x + 16 - 1
K = - 3x² - 4x + 15.
