X\u00e9t tuy\u1ec3n theo ph\u1ea7n m\u1ec1m chung: B\u1ed9 ph\u1ea3i thay \u0111\u1ed5i quy ch\u1ebf tuy\u1ec3n sinh m\u1edbi ban h\u00e0nh<\/a><\/blockquote><\/iframe>