+0  
 
-1
206
1
avatar+1015 

Multiply.

(−4−7i)(3−5i)

 

Enter your answer, in standard form, in the box.

AngelRay  Dec 20, 2017
 #1
avatar+19480 
+2

Multiply.

(−4−7i)(3−5i)

 

\(\begin{array}{|rcll|} \hline && (-4-7i)(3-5i) \\ &=& -12+20i-21i+35i^2 \\ &=& -12-i+35i^2 \quad & | \quad i^2 = -1 \\ &=& -12-i-35 \\ &=& -47-i \\ \hline \end{array}\)

 

laugh

heureka  Dec 20, 2017

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