anonymous
  • anonymous
Add the complex expressions, and simplify. (9 + 9.4i) + (-8.6 – 4i)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Akshay_Budhkar
  • Akshay_Budhkar
Add the imaginary part together and the real part together
anonymous
  • anonymous
combine like terms
Akshay_Budhkar
  • Akshay_Budhkar
basic rule is\[(c+di)+(a+bi)= (a+c)+(b+d)i\]

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anonymous
  • anonymous
ok i am lost
Akshay_Budhkar
  • Akshay_Budhkar
just combine like terms together like in this question you have \[(9 + 9.4i) + (-8.6 – 4i)= (9-8.6)+(9.4-4)i\]
anonymous
  • anonymous
ok so would you add the same ones together or would it be like 9 ^2
Mertsj
  • Mertsj
Add the real parts and add the imaginary parts. what is 9+-8.6?
Akshay_Budhkar
  • Akshay_Budhkar
you would add the same ones together
anonymous
  • anonymous
0.4
Mertsj
  • Mertsj
What is 9.4i -4i?
Mertsj
  • Mertsj
Yes. so the real part is .4
Mertsj
  • Mertsj
Now do the imaginary part
Akshay_Budhkar
  • Akshay_Budhkar
you just need to separate the real and the imaginary parts for real you have 9-8.6=0.4 for imaginary (9.4-4)i = 5.4i
Mertsj
  • Mertsj
9.4i-4i
Mertsj
  • Mertsj
So the answer is .4+5.4i

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