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Proof step 4 from proof square-sqrt-02 (previous step)

dec.scale % 2 = 0, ∃ j. j * j = dec.int ⊦ mkDecimal(sqrt(dec.int), dec.scale / 2) * mkDecimal(sqrt(dec.int), dec.scale / 2) = dec

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information