Example

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

Question

$$\sqrt { x ^ { 2 } + 4 x + 13 } + \sqrt { x ^ { 2 } + 4 x + 5 } = 2$$

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