已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=

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已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=
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已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=
已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=

已知实数a,b,c,满足a=b-c,c^2=ab-9,则a= b= c=
c^2=ab-9=(6-b)*b-9>=0
b^2-6b+9<=0
b=3
a=6-3=3
c=0