anonymous
  • anonymous
subtract. 6-(-9+6i)-(-1-i)=
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Nnesha
  • Nnesha
same like last one what would be ur first step?
anonymous
  • anonymous
I tried doing the same process nasha bc i thought they were similar but it didnt work
Nnesha
  • Nnesha
okay show ur work plz i'll see where u did mistake :=)

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anonymous
  • anonymous
put all like terms together 6, -9, -1 and then 6i, -i
anonymous
  • anonymous
okay one sec
anonymous
  • anonymous
|dw:1441038217966:dw|
Nnesha
  • Nnesha
you didn't distribute \[\huge\rm -(-9+6i)\]
anonymous
  • anonymous
oh do i need to distribute a negative one?
Nnesha
  • Nnesha
yes right!
Nnesha
  • Nnesha
you CAN'T combine like terms without distributing by outside terms
anonymous
  • anonymous
okay and is it the same for the -(-1-i)
Nnesha
  • Nnesha
yes right
Nnesha
  • Nnesha
|dw:1441038698971:dw| you already distributd -(-1+i)
anonymous
  • anonymous
is the answer 48-7i
Nnesha
  • Nnesha
hmm nope how did you get that ? :=)
anonymous
  • anonymous
okay so this is how it started |dw:1441039035100:dw| |dw:1441039412530:dw| |dw:1441039667322:dw|
Nnesha
  • Nnesha
|dw:1441039925205:dw| you can remove parentheses after distributing by negative
Nnesha
  • Nnesha
it's not 6(9+6i)
anonymous
  • anonymous
oh okay
Nnesha
  • Nnesha
yes so it's 6+9-6i+1+i
Nnesha
  • Nnesha
now combine like terms
anonymous
  • anonymous
im getting 16+7i again
anonymous
  • anonymous
wait actually 16-7i
anonymous
  • anonymous
no okay one more try its actually 16-5i
anonymous
  • anonymous
is that right?
Nnesha
  • Nnesha
right!
anonymous
  • anonymous
okay thank you!!!
Nnesha
  • Nnesha
my pleasure!
Nnesha
  • Nnesha
good work!

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