Question

solve it asap....................​

Answer 1

WHere is the question

Answer 2

Answer:

144√5

Step-by-step explanation:

At first we have x.

Find reciprocal of x and then rationalise as follows,

1/x=1/(9+4√5)

or,1/x=(9-4√5)/{(9+4√5)(9-4√5)}[multiply the numerator and denominator by 9-4√5]

or,1/x=9-4√5/(81-80)

or,1/x=9-4√5

x^2-1/x^2=(x+1/x)(x-1/x)

put the values of x and 1/x in the above equation and find the value of x square minus one upon x square.