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caranya
√2 - √3 per √2 + √3
= √2 -√3 per √2 + √3 dikalikan √2 - √3 per √2 - √3
= 2 -2√6 + 3 per 2 - 3
= -1 - 2√6 per -1
= 1 + 2 √6
a+b = 1+2 = 3
semoga bermanfaat