find 'a' and 'b' if (8+2√5)/(9+3√5)= a+b√5
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L.H.S
(8+2√5)(9+3√5)
==> 72 + 24√5 + 18√5 + 6(5)
==> 72 + 30 + 42√5
==> 102 + 42√5
==> 2(51+21√5)
==> 51 + 21√5
answer ===> a = 102 or 51
and b= 42 or 21
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