Given two complex numbers in the form of −a⋅−b\sqrt{-a} \cdot \sqrt{-b}−a⋅−b, where aaa and bbb are non-negative real numbers.
This gives us ia⋅ibi\sqrt{a} \cdot i\sqrt{b}ia⋅ib.
Multiplying the expressions gives us i2abi^2\sqrt{ab}i2ab.
This simplifies to −ab-\sqrt{ab}−ab.
The result of multiplying −9\sqrt{-9}−9 and −49\sqrt{-49}−49 is −441-\sqrt{441}−441 = -21.
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