3/√3-2÷(√3+1) thank you very much!
问题描述：
3/√3-2÷(√3+1) thank you very much!
答
原式
3/(√3-2)*(√3+1)
=3(√3+2)/(√3-2)(√3+2)*(√3+1)
=3(√3+2)*(√3+1)
=3(3+2√3+√3+2)
=3(5+3√3)
=15+9√3