Mathematics for IGCSE & O level - Surds (Section 2 - No. 46)

Given x = 3 - √2, what is the value of x^2?

11 - 6√2

11 + 6√2

7

7 - 6√2

Explication

x^2 = (3 - √2)^2 = 9 - 6√2 + 2 = 11 - 6√2

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