If let us calculate the simplified value of

Formula used.

(a-b)³ = a³-b³-3ab(a-b)

If x = 2 + √3

Then;

Simplifying it we get;

= = 2-√3

x – = 2 + √3 – [2 - √3]

= 2√3

(x – )³ = x³- ³-3 × x × × (x – )

(x – )³ = x³- -3 × 1 × (x – )

(2√3)³ = x³- -3 × (2√3)

x³ - = 24√3 + 6√3

x³ - = 30√3