The conjugate complex of complex 2i1 − I is______ ．

By simplifying, we can get 2i1 − I = 2I (1 + I) (1 − I) (1 + I) = 2I (1 + I) 2 = I (1 + I) = - 1 + I, and the conjugate complex of the complex 2i1 − I is: - 1-I, so the answer is: - 1-i

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