(x-3-5i)*(x-3+5i)?

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(x-3-5i)*(x-3+5i)?

Guest Jan 24, 2017

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Best Answer

(x-3-5i)*(x-3+5i) ?

Formula:

$\begin{array}{|rcll|} \hline z\cdot \bar{z} = (a+bi)(a-bi)=a^2+b^2=|z|^2 \\ \hline \end{array}$

$\begin{array}{|rcll|} \hline && [(x-3)-5i]\cdot [(x-3)+5i ] \\ &=&(x-3)^2+5^2 \\ &=& x^2-6x+9 +25 \\ &=& x^2-6x+ 34 \\ \hline \end{array}$

heureka Jan 24, 2017

heureka · Answer 1 · 2017-01-24T05:40:26

(x-3-5i)*(x-3+5i) ?

Formula:

$\begin{array}{|rcll|} \hline z\cdot \bar{z} = (a+bi)(a-bi)=a^2+b^2=|z|^2 \\ \hline \end{array}$

$\begin{array}{|rcll|} \hline && [(x-3)-5i]\cdot [(x-3)+5i ] \\ &=&(x-3)^2+5^2 \\ &=& x^2-6x+9 +25 \\ &=& x^2-6x+ 34 \\ \hline \end{array}$