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c) 3-2√7 / √7 =3√7-14 / 7
e) 2+3√5 / -2-√5 = -4√5+11 / 4-5 = 4√5-11
f) 3-√7 / 3+√7 = 9-6√7+7 / 9-7 = 16-6√7 / 2 = 8-3√7
h) 8√5 / √5-√3 = 40-8√15 / 5-3 = 40-8√15 / 2 = 20-4√15
j) 7-2√8 / 3√5-2√3 = 21√5+14√3-12√10-8√6 / 45-12 = 21√5+14√3-12√10-8√6 / 33