Evaluate the Expression $( 5 + 10 i ) ( 7 - 9 i )$

question 81

Short Answer

Evaluate the expression $( 5 + 10 i ) ( 7 - 9 i )$ and write the result in the form a + bi.

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Definitions:

360-Day Year

A simplified accounting method that assumes there are 360 days in a year, used for calculating interest and other financial metrics.

Principal

The original sum of money borrowed in a loan, or the initial amount of investment, excluding interest or profit.

Ordinary Simple Interest

Interest calculated on the principal amount only, without compounding, over a specific period.

360-Day Year

An accounting convention used for interest calculations where the year is simplified to 360 days to ease the computation process.