Question

If a =√2 find the value of( a - 1/a)²​

Answer 1

Answer:

the answer is qst substitute the values (√2-1/√2)²=-1√²=1

Answer 2

Answer:

Step-by-step explanation:

a= √2

1/a = 1/ √2

(a - 1/ a)^2 = (√2 - 1/ √2 )^2

                 = √2 ^2  + (1/ √2) ^2 - 2* √2 *1/ √2

                 = 2 + 1/2 -2

                  = 1/2