Sum
Answer the following:
Simplify the following and express in the form a + ib:
`5/2"i"(-4 - 3"i")`
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Solution
`5/2"i"(-4 - 3"i")`
= `-10"i" - 15/2"i"^2`
= `-10"i" + 15/2` ...[∵ i2 = – 1]
= `15/2 - 10"i"`, which is of the form a + bi.
Concept: Algebra of Complex Numbers
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