问题
选择题
当a=4,b=5,c=6时,bc-ac的值是( )
A.1
B.10
C.6
D.4
答案
当a=4,b=5,c=6时,
bc-ac,
=(b-a)c,
=(5-4)×6,
=1×6,
=6;
故选:C.
当a=4,b=5,c=6时,bc-ac的值是( )
A.1
B.10
C.6
D.4
当a=4,b=5,c=6时,
bc-ac,
=(b-a)c,
=(5-4)×6,
=1×6,
=6;
故选:C.