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Which expression is equivalent to (5+9i)(4+5i)? A. 61+25i B. 25-61i C. 20-45i D. -25+61i

Which expression is equivalent to (5+9i)(4+5i)? A. 61+25i B. 25-61i C. 20-45i D. -25+61i
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1 vote
Which expression is equivalent to (5+9i)(4+5i)?

A. 61+25i

B. 25-61i

C. 20-45i

D. -25+61i

asked
User Pavel Shliaha
by
8.9k points

1 Answer

0 votes

Answer:

(5 + 9i)(4 + 5i) = 20 + 61i - 45 = -25 + 61i

D is the correct answer.

answered
User Ferdinand Neman
by
7.2k points
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