Q. 7 A33.7( 7 Votes )

# If <span lang="EN

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

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