Example

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

Question

$$\sqrt { 2 } = 1.4142 \sqrt { \frac { \sqrt { 2 } - 1 } { \sqrt { 2 } + 1 } }$$

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