Question

if
$a {3} - \frac{1}{a {3} } = 4$
what is value of
$a - \frac{1}{a}$
​

Answer 1

Answer:

Given that,

a=2+

Then, Value of

a−

a

1

=2+

3

−

2+

3

1

=2+

3

−

2+

3

1

×

2−

3

2−

3

onrationalize

=2+

3

−

4−3

(2−

3

)

=2+

3

−2+

3

=2

3

Hence, this is the answer.