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Multiply the complex numbers (4-5i) and (3-2i). Express the answer in the form x+iy.

Mathematics

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Answer

2-23i

Step-by-step solution

4 steps

here's the solution for .

  1. Write the given expression.

    We need to multiply the complex numbers (4−5i)(4-5i) and (3−2i)(3-2i).

    (4−5i)(3−2i)(4-5i)(3-2i)
  2. Expand the product using the distributive property (FOIL method).

    Multiply each term in the first parenthesis by each term in the second parenthesis:

    4(3)+4(−2i)−5i(3)−5i(−2i)4(3) + 4(-2i) - 5i(3) - 5i(-2i) 12−8i−15i+10i212 - 8i - 15i + 10i^2
  3. Substitute i2=−1i^2 = -1.

    12−8i−15i+10(−1)12 - 8i - 15i + 10(-1) 12−8i−15i−1012 - 8i - 15i - 10
  4. Combine the real parts and the imaginary parts.

    Group the real terms and the imaginary terms:

    (12−10)+(−8i−15i)(12 - 10) + (-8i - 15i) 2−23i2 - 23i

    The expression in the form x+iyx+iy is 2−23i2-23i.

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