Processing Math: Done
Lösung 3.1:1d
Aus Online Mathematik Brückenkurs 2
(Unterschied zwischen Versionen)
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We expand the expression by multiplying each term in the first bracket with every term in the second bracket, | We expand the expression by multiplying each term in the first bracket with every term in the second bracket, | ||
- | {{ | + | {{Abgesetzte Formel||<math>\begin{align} |
(3-2i)(7+5i) | (3-2i)(7+5i) | ||
&= 3\cdot 7 + 3 \cdot 5i + \cdots\\[5pt] | &= 3\cdot 7 + 3 \cdot 5i + \cdots\\[5pt] | ||
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Then, we use that <math>i^2=-1</math> and write the real and imaginary parts together, | Then, we use that <math>i^2=-1</math> and write the real and imaginary parts together, | ||
- | {{ | + | {{Abgesetzte Formel||<math>\begin{align} |
(3-2i)(7+5i) | (3-2i)(7+5i) | ||
&=21+15i-14i-10i^2\\[5pt] | &=21+15i-14i-10i^2\\[5pt] |
Version vom 13:05, 10. Mär. 2009
We expand the expression by multiplying each term in the first bracket with every term in the second bracket,
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Then, we use that
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