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What is equivalent to (4+5i)(4-5i)
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What is equivalent to (4+5i)(4-5i)

User Gokulakrishnan
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2 Answers

6 votes
16-25i because you have to find like terms and since there are parenthesis you have to mutiply the like terms
User Mobina
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(4+5i)(4-5i)=(4)²-(5i)²=16-25(i)²=16-25(-1)=16+25=41
User Jitka
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