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Kelas 9 MatematikaBab Akar dan Pangkat
7/(5 + 2√3)
= 7/(5 + 2√3) . (5 - 2√3)/(5 - 2√3)
= (7 (5 - 2√3))/(5² - (2√3)²)
= (7 (5 - 2√3))/(25 - 12)
= (1/13) . (35 - 14√3)