RAPH1917 RAPH1917 01-12-2022 Mathématiques Answered Aidez moi svp B(y) = (7-3y)² E(x) = (x + 7)(x-7) H(u) = (3u-1)(3u + 1) C(x) = (3-x)² F(x) = (1 + 3x)² I(x) = (4x + 9) (4x - 9)