计算:-3a+2a-5a 5(2a-1)
问题描述:
计算:-3a+2a-5a 5(2a-1)
答
888888wy你好!
计算:-3a+2a-5a 5(2a-1)
=-a-25a(2a-1)
=-a-50a^2+25a
=24a-50a^2