A technique of expressing an equation in the most efficient form possible while altering the quality of the underlying statement is known an algebraic equation.
⇒ (- 20 - 3i) - (- 22 - 1i)
⇒ (- 20 - 3i + 22 + 1i)
⇒ (2 - 2i)
Therefore the simplification of the given expression is "(2 - 2i)"
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