how do i express the following in rectangular form? -3+5i+(7+4i)/(1+2i) thankyou,
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Originally Posted by Jonny-123 how do i express the following in rectangular form? -3+5i+(7+4i)/(1+2i) thankyou, $\displaystyle -3+5i + \frac{7+4i}{1+2i} \cdot \frac{1-2i}{1-2i}$ multiply the ratios and simplify.
Last edited by mr fantastic; Aug 12th 2009 at 07:58 PM.
Originally Posted by Jonny-123 how do i express the following in rectangular form? -3+5i+(7+4i)/(1+2i) Which is it $\displaystyle - 3 + 5i + \frac{{7 + 4i}}{{1 + 2i}}\text{ or }\frac{{( - 3 + 5i)(7 + 4i)}}{{1 + 2i}}$? In any case $\displaystyle \frac{1}{z} = \frac{{\overline z }}{{\left| z \right|^2 }}$
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