Simplify 23-2-13-22.
Explanation:
Rationalizing the first term here, 23-2 = 23-2×3+23+2 = 2√3 + 2√2.
Rationalizing the second term here, 13-22 = 13-22×3+223+22 = 3 + 2√2
∴ 23+2-13-22 = 2√3 + 2√2 – (3 + 2√2) = 2√3 – 3 = √3(2 - √3)
Hence, option (b).
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