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= (6+2√2) / 9-2
= (6 + 2√2) / 7
2. 3 / (6+√3) = 3(6-√3) / (6-√3)(6+√3)
= 18 - 3√3 / 36-3
= 18-3√3 / 33
3. 4 /(√7-√5) = 4(√7+√5) / (√7-√5)(√7+√5)
4√7+5√5 / 7-5
4√7+5√5 / 2
jawabn soal B
jawabn soal C