已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=
问题描述：
已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=
答
c^2=ab-9=(6-b)*b-9>=0
b^2-6b+9b=3
a=6-3=3
c=0