Question

Find the value of (a-1/a)(a-1/a),if a=2+√3​

Answer 1

Answer:

answer is 2

while putting value u can get it

Answer 2

Answer:

2

Step-by-step explanation:

(a-1/a)(a-1/a)

(a-1)^2/a^2

a^2 + 1^2 - 2(a)(1)

(2+√3)^2 + 1 - 2(2+√3)

4 + 3 + 4√3 + 1 - 4 - 2√3

4 + 2√3/2 + √3

rationalize

(4+2√3)(2-√3)/(2+√3)(2-√3)

8 - 4√3 + 4√3 - 6/4 - 3

2/1 = 2