x^2 = 14 + 2\sqrt{7^2 - (2\sqrt{10})^2} = 14 + 2\sqrt{49 - 40} = 14 + 2\sqrt{9} = 14 + 2 \times 3 = 14 + 6 = 20

Mon, 04 May 2026 13:17:33 +0000

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