1.3√20+√45-√1⼀5 2.3√40-√2⼀5-2√1⼀10 3.4(√3+√7)^0+√1⼀2*√8-(1-√2)^2 4.9√3-7√12+5√48

2024-12-29 11:22:38
推荐回答(1个)
回答1:

1.3√20+√45-√1/5
=6√5+3√5-1/5√5
=44/5√5

2.3√40-√2/5-2√1/10
=6√10-1/5√10-1/5√10
=28/5√10

3.4(√3+√7)^0+√1/2*√8-(1-√2)^2
=4x1+2-(1-2√2+2)
=4+2-3+2√2
=3+2√2

4.9√3-7√12+5√48
=9√3-14√3+20√3
=15√3