计算[10(√1⼀5)-(1⼀2√20)]-[5⼀4(√4⼀5)-(3⼀7√245)] 过程!

2025-02-25 03:19:26
推荐回答(1个)
回答1:

[10√(1/5)-1/2√(20)]-[(5/4)√(4/5)-3/7√245]
=10*1/5√5-1/2*2√5-(5/4*2/5√5-3/7*7√5)
=2√5-√5-5/2√5
= -3/2√5