Question

√5-√3 √5+√3 = a-b√15

Answer 1

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Answer 2

√5-√3/√5+√3× √5-√3/√5-√3
(√5-√3)^2/(√5)^2-(√3)^2
8-2√15/5-3
8-2√15/2
2(4-√15)/2
4-√15

A=4
B=1