Jaeden
  • Jaeden
What is the standard form of (1 + 7i)(3 − i)?
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SOLVED
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chestercat
  • chestercat
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pooja195
  • pooja195
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pooja195
  • pooja195
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DariusX
  • DariusX
This is easy. All you need to know is that 'i' squared equals minus one. i^2 = -1 Also, remember that the standart form of a complex number looks like this: Z = x + yi Now, let's do the math. (1 + 7i)(3 − i) = 3 - i + 21i - 7i^2 = 3 + 20i - 7 * (-1) = 3 + 20i + 7 = 10 + 20i And there you go. The answer is: 10 + 20i

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