√1的3/5x2√3*(负1/2√10)·

问题描述:

√1的3/5x2√3*(负1/2√10)·

√1的3/5x2√3*(负1/2√10)
=-1/2√(8/5x2/3x10)
=-1/2√32/3
=-√8/3
=-2/3√6