9 25 2x =( 3 5 July 8, 2019 16 32 64 128 25 2x 3 25 5x 9 2x 3 5 2 9 25 2x 3 5 mũ 2 9 25 0 25 2x 3 5 9 16 2x 3 5 )- 9 25 0
