Bonjour,
factoriser les expressions suivantes:
A = ( 5x -3) ^2 - 81x^2
A = a² - b²
A = (a - b)(a + b)
A = (5x - 3)² - (9x)²
A = (5x - 3 - 9x)(5x - 3 + 9x)
A = (-4x - 3)(14x - 3)
B = 25x^2 - ( 4x - 3)^2
B = (5x)² - (4x - 3)²
B = (5x - 4x + 3)(5x + 4x - 3)
B = (x + 3)(9x - 3)
B = 3(x + 3)(3x - 1)