4√5+√45-√8+4√2=?
问题描述:
4√5+√45-√8+4√2=?
答
4√5+√45-√8+4√2
=4√5+3√5-2√2+4√2
=7√5-2√2
4√5+√45-√8+4√2=?
4√5+√45-√8+4√2
=4√5+3√5-2√2+4√2
=7√5-2√2