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Mathematics for IGCSE & O level - Surds (Section 1 - No. 33)

If x = 3-√2, what is x^2?
11 - 6√2
7
11+6√2
9-√2

Тайлбар

x^2 = (3-√2)^2 = 9 - 6√2 + 2 = 11-6√2

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