Math Problem Statement

(-6-i)(3-2i)

Solution

To solve (6i)(32i)(-6 - i)(3 - 2i), we will use the distributive property (also known as FOIL for binomials), multiplying each term in the first complex number by each term in the second complex number.

  1. First, multiply the real parts: 6×3=18-6 \times 3 = -18

  2. Then, multiply the real part of the first number by the imaginary part of the second number: 6×(2i)=12i-6 \times (-2i) = 12i

  3. Next, multiply the imaginary part of the first number by the real part of the second number: i×3=3i-i \times 3 = -3i

  4. Finally, multiply the imaginary parts: i×(2i)=2i2-i \times (-2i) = 2i^2 Since i2=1i^2 = -1, this becomes: 2i2=2(1)=22i^2 = 2(-1) = -2

Now, combine all the results: 18+12i3i2=(182)+(12i3i)=20+9i-18 + 12i - 3i - 2 = (-18 - 2) + (12i - 3i) = -20 + 9i

So, (6i)(32i)=20+9i(-6 - i)(3 - 2i) = -20 + 9i.

Would you like more details or further clarification?

Here are five related questions for you:

  1. How do you multiply complex numbers in general?
  2. What happens when you multiply two purely imaginary numbers?
  3. How do you convert a complex number from rectangular to polar form?
  4. What is the significance of the imaginary unit ii in mathematics?
  5. How do you find the conjugate of a complex number?

Tip: When multiplying complex numbers, always remember to simplify i2=1i^2 = -1 to handle the imaginary components correctly.

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Math Problem Analysis

Mathematical Concepts

Algebra
Complex Numbers
Distributive Property
Imaginary Numbers

Formulas

Distributive property: (a + bi)(c + di) = (ac - bd) + (ad + bc)i
i^2 = -1

Theorems

Properties of Complex Numbers

Suitable Grade Level

Grades 10-12