Example

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

Question

$$a + i b = \sqrt { \frac { 1 + i } { 1 - i } } , a ^ { 2 } + b ^ { 2 } = 1$$

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