Question

1题2√12+√3/√3，2题（4√6-4√1/2+3√8）除2√2，三题5√1/5+1/2√20-5/2√1/5+√45 很急！！！！

Answer 1

1题2√12+√3/√3，2题（4√6-4√1/2+3√8）除2√2，三题5√1/5+1/2√20-5/2√1/5+√45

（2√12+√3）/√3
=（4√3+√3）/√3
=5

4√6-4√1/2+3√8)/2√2
=(4√6-2√2+6√2)/2√2
=(4√6+4√2)/2√2

=(4√2√3+4√2)/2√2=2√3+2

5√1/5+1/2√20-5/2√1/5+√45
=√5+√5-1/2√5+3√5
=5√5-1/2√5
=9/2√5

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Answer 2

1题（2√12+√3）/√3
=2√(12÷3)+√3/√3
=4+1
=5

2题（4√6-4√1/2+3√8）除2√2，
=4√6÷2√2-4√1/2÷2√2+3√8÷2√2
=2√3 -1+3
=2√3+2

三题5√1/5+1/2√20-5/2√1/5+√45
=√5 +√5 -1/2√5+3√5
=9/2 √5

Answer 3

1. =4√3 +1

2. =2√3+2

3. =5√5 * 1.5