Resolver (6- sqrt 7) ^ 2 +(3+ sqrt 7 )^ 2 -3(1- sqrt 28 ). | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$(6-\sqrt{7)}^{2}+(3+\sqrt{7})^{2}-3(1-\sqrt{28}).$$