2﹙x－3﹚²＋﹙3x－x²﹚＝0
2﹙x－3﹚²－x﹙x－3﹚＝0
﹙x－3﹚﹙2x－6－x﹚＝0
﹙x－3﹚﹙x－6﹚＝0
x1＝3
x2＝6