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10-104.

Calculate $(2 + i)(3 - 5i) - (1 - 4i)^2$ .

Step 1:

$(2 + i)(3 - 5i) - (1 - 4i)(1 - 4i)$

Step 2:

$(6 - 10i + 3i − 5i^2) - ( ? )$

Step 3:

Combine like terms.

Step 4:

Simplify. Recall that $i^2 = -1$ .

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