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Express (5-4i)-2(3+6i) as a complex number.

 Jun 16, 2021
 #1
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(5-4i)-2(3+6i)  = 5 - 4i - 6 - 6i

 

Combine all real parts together and all imaginary parts together, s0:  (5-4i)-2(3+6i) =  -1 -10i

 Jun 16, 2021

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