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1.Simplify the expression . Show your work.

Answer:

 

AngelRay  Jan 17, 2018
 #1
avatar+246 
0

multiply out brackets:

 

3+15i-4i- -20

 

double negatives cancel out

 

3+15i-4i+20

 

move like terms together:

 

20+3+15i-4i-(2-i)

 

15i-4i = 11i

 

20+3+11i-(2-i)

 

*20+3=23*

 

23+11i-(2-i) or to avoid confusion (23+11i)-(2-i)

 

i can't squeeze anymore out of it so:

 

(3-4i)(1+5i)-(2-i) becomes 23+11i - (2-i) . peace.cool

Scruffy23.  Jan 17, 2018
 #2
avatar+17736 
0

Scruffy has taken (3 - 4i)(1 + 5i) - (2 - i)

                        to  23 + 11i - (2 - i)

Finishing:              23 + 11i - (2 - i)  =  23 + 11i - 2 + i

                                                       =  23 - 2 + 11i + i

                                                       =  21 + 12i

geno3141  Jan 17, 2018

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