计算:(3a-2)(2a+5)=______.
原式=6a2+15a-4a-10
=6a2+11a-10.
故答案为:6a2+11a-10.
公共建筑中常用坡道的坡度是()。
A.4%~8%
B.8%~15%
C.16%~18%
D.18%~24%