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Complex Numbers Lesson - Adding, Subtracting, Multiplying, and Dividing

This lesson covers the basics of complex numbers, including adding, subtracting, multiplying, and dividing. It includes necessary vocabulary and examples for better understanding. Homework problems are provided for practice.

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Complex Numbers Lesson - Adding, Subtracting, Multiplying, and Dividing

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  1. HW:Pg253 #8-12, 19-26 Warm up: • Questions Answers • 1) • 2)

  2. Complex Numbers Lesson 4.8

  3. Square root of a negative real number • Necessary Vocab • Imaginary unit: is the complex number whose square is -1. • So, and

  4. Vocabulary • Imaginary number: any number of the form where a and b are real numbers and Imaginary Part Real Part

  5. More Vocabulary • Complex number: can be written in the form where a and b are real numbers. • Ex: 3 + 5i • Pure imaginary number: can be written in the form , where a=0 and • Ex: 5i

  6. 1) Adding and Subtracting Complex Numbers • What is the sum or Difference

  7. 2) T.O.O. (Try On Own)

  8. 3) Multiplying complex numbers • What is each product?

  9. 4) T.O.O: HINT* remember how you multiplied binomials in Algebra 1 (FOIL)

  10. 5) One more of multiplying complex numbers Remember difference of Square Binomials?!?

  11. 6) Dividing Complex Numbers: lets do this together

  12. 7) A little more complex

  13. Now it is your turn • Questions Answers • 8) 9)

  14. Mixed Review • Questions Answers • 10) • 11) • 12)

  15. More math Jokes

  16. Homework Pg 253 #8-12, 19-26

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