RAVEN4 RAVEN4 03-04-2022 Mathématiques Answered Bonjour ! Factorise ces expressions. A = t² + 81 + 18t B = 4x² - 4xy + y² C = 81 + 16y² - 72y D = x² + 36 - 12x E = (4/9)p² + (4/3)pq + q² F = π² + 10π + 25