Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{ 7+3 \sqrt{ 5 } }{ 7-3 \sqrt{ 5 } } =a+ \sqrt{ 5b }$$

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