Sagot :
Réponse :
A = 2(5x-1)-(3x-2)
A = 10x-2-3x+2 = 7x
B = (5x-4)(6x-3)
B = 30x²-15x-24x+12
B = 30x² - 39x + 12
C = (2x-1)²
C = (2x-1)(2x-1) = 4x² - 2x - 2x + 1 = 4x² - 4x + 1
D = (3x+1)(3x-1)
D = 9x² - 3x + 3x - 1 = 9x² - 1
E = x² - 3x = x(x -3)
F = x² - 6x + 9 = (x - 3)(x - 3)
G = y² - 16 = (y - 4)(y + 4)
H = 4x² - 12x + 9 = (2x -3)(2x -3)
T = (4x-6)(x+3)-(x+3)
a. T = 4x² + 12x - 6x - 18 - x - 3= 4x² + 5x - 15
b. T = (2x +3)(2x + 5)
Explications étape par étape