Multiply and simplify the following complex numb $(-4-5 i) \cdot(1-i)$
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Answer

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Answer

$\boxed{-9 - i}$ is the final answer.

Steps

Step 1 ：Multiply the two complex numbers (-4-5i) and (1-i) similar to the multiplication of binomials.

Step 2 ：Remember that i^2 = -1.

Step 3 ：The multiplication results in a complex number -9 - i.

Step 4 ：$\boxed{-9 - i}$ is the final answer.