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How do I solve (3+i)(3-i)

How do I solve (3+i)(3-i)
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3 votes
How do I solve (3+i)(3-i)

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User Glenn Stevens
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2 Answers

5 votes
(3+I)(3-1)
-i^2+9=0
-I^2=-9
I^2=9
i= + or - 3
answered
User Jlalcazar
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7.8k points
2 votes

(3+i)(3-i)=3(3-i)+i(3-i)=9-3i+3i-i^2=9-(-1)=\\\\=9+1=10
answered
User NobinPegasus
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7.6k points
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