<PRE><B>Question 459753</B>
simplify 
1. (3+2i)+ (-5-3i) = (2-5)+(2-3)i = -3-i
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2. (6-3i) - (2+i)
= 6-2 -3-1
= 4 - 4i
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3. (3+i)(3-i)
= 9-3i+3i-(-1)
= 10
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4. (5+ 2i) (3+i)
= 15+5i+6i-2
= 13+11i
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Cheers,
Stan H.

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