Bonsoir,
F = (t + 2)(3t + 5) + (2t - 1)² - (5t + 4)²
F = (t + 2)(3t + 5) + (2t - 1 + 5t + 4)(2t - 1 - 5t - 4 )
F = (t + 2)(3t + 5) + (7t + 3)(- 3t - 5)
F = (t + 2)(3t + 5) - (7t + 3)(3t + 5)
F = (3t + 5)(t + 2 - 7t - 3)
F = (3t + 5)(-6t - 1)
G = (t - 3)(5 - t) + (9t² - 24t - 9)
G = (t - 3)(5 - t) + 3(t - 3)(3t + 1)
G = (t - 3)(5 - t) + (9t + 3)(t - 3)
G = (t - 3)(5 - t + 9t + 3)
G = (t - 3)(8t + 8)
G = 8(t - 3)(t + 1)
