∴(x﹣3)(﹣x﹣3)=0,
则x﹣3=0或﹣x﹣3=0,
解得:x=3或x=﹣3,
即x1=3,x2=﹣3
世界上被称为“教育王国”的是哪一个国家?
Jenny is afraid to travel by plane.She always feels when getting on it.( )