Question

If =1/2, = 3 and = 1, then find the value of ^2 − 4.

Answer 1

Given that,

a=2+√3

Then value of

a-1/a=2+√3-1/2+√3

=2+√3-1/2+√3 x

2-√3/2-√3. on rationalize

=2+√3-(2-√3)/4-3

=2+√3-2+√3

=2√3

Hence proved

Answer 2

Hope it helps you

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