Question

If a = 2+ √3 , then find the value of a-1÷a​

Answer 1

Step-by-step explanation:

Given that,

a=2+3

Then, Value of

  a−a1=2+3−2+31

 =2+3−2+31×2−32−3onrationalize

 =2+3−4−3(2−3)

 =2+3−2+3

 =23

Hence, this is the answer.