11.计算(x-y+3)(x+y-3)时,下列各变形中正确的是( )
0 283565 283573 283579 283583 283589 283591 283595 283601 283603 283609 283615 283619 283621 283625 283631 283633 283639 283643 283645 283649 283651 283655 283657 283659 283660 283661 283663 283664 283665 283667 283669 283673 283675 283679 283681 283685 283691 283693 283699 283703 283705 283709 283715 283721 283723 283729 283733 283735 283741 283745 283751 283759 366461
| A. | [(x-y)+3][(x+y)-3] | B. | [(x+3)-y][(x-3)+y] | C. | [x-(y+3)][x+(y-3)] | D. | [x-(y-3)][x+(y-3)] |