证明:延长AE、BC交于点F.∵AE⊥BE,∴∠BEF=90°,又∠ACF=∠ACB=90°,
∴∠DBC+∠AFC=∠FAC+∠AFC=90°,∴∠DBC=∠FAC,在△ACF和△BCD中,
∠ACF=∠BCD=90°
AC=BC
∠FAC=∠DBC
∴△ACF≌△BCD(ASA),∴AF=BD.又AE=
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BD,∴AE=EF.∴AB=BF,∴BD是∠ABC的角平分线.
“求证BD是角ACB的平分线”你求证写的不对吧