2x 2 9x 1 0 July 8, 2019 16 32 64 128 2x 3 9x 2 12x 1 0 2x 7x 1 )( 9x 2 − 25 )= 0 Giải pt 2x 1 2 9x 2 0 2x 1 mũ 2 9x mũ 2 0 2x 9
