9.用直接开平方法解下列一元二次方程,其中无解的方程为( )
0 295541 295549 295555 295559 295565 295567 295571 295577 295579 295585 295591 295595 295597 295601 295607 295609 295615 295619 295621 295625 295627 295631 295633 295635 295636 295637 295639 295640 295641 295643 295645 295649 295651 295655 295657 295661 295667 295669 295675 295679 295681 295685 295691 295697 295699 295705 295709 295711 295717 295721 295727 295735 366461
| A. | x2-1=0 | B. | x2=0 | C. | x2+4=0 | D. | -x2+3=0 |