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Lösung 3.1:1b

Aus Online Mathematik Brückenkurs 2

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Version vom 10:28, 11. Mär. 2009

When we remove the parentheses, the terms inside change sign,

3i(2i)=3i2+i.

Then, we collect together real and imaginary parts,

3i2+i=2+(3i+i)=2+(3+1)i=2+4i.