Simplify this question
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(3+2√7)/5+3√7)×(5-3√7)/5-3√7)= a+b√7
(3+2√7)(5-3√7)/(5)2-(3√7)2 = a+b√7
15-9√7+10√7-42 /25-63 = a+b√7
√7-27/(-42)= a+b√7
27-√7/42 = a+b√7
a = 27/42
b = -1/42
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