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Daniel Langer · Answer 1 · 2022-12-02T05:35:13+0000

Answer:

D(- 1) = 2

Explanation:

To evaluate D(- 1), substitute x = - 1 into D(x) , that is

D(- 1) = (- 1)² - 2(- 1) - 1 = 1 + 2 - 1 = 2