已知点C是线段AB的黄金分割点,且AC>BC,则下列等式中正确的是( )
A:AB2=AC·BC
B:BC2=AC·AB
C:AC2=BC·AB
D:AC2=2AB·BC
2×( )<15____
( )×7<36____
( )×7<22____
6×( )<43____