由题意得：（x+3）（x-2）=0，且x+3≠0，
解得：x=2，
故答案为：x=2．
--What did you say just now?
--I asked _______.
A．that I could open the door
B．could I open the door
C．how could I open the door
D．how I could open the door
肌酸激酶(CK)是由2个亚单位组成的二聚体，产生的同工酶有
A．2种B．3种C．4种D．5种E．6种
