5.4 imaginary and complex numbers -...

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Algebra 2 Trig Name__________________________________ 5.4 Imaginary and Complex Numbers I. Imaginary Numbers Let i = So 2 i = 3 i = 4 i = 5 i = II. Complex Numbers: Real vs. Imaginary III. Operations & Simplifying with Complex Numbers a. Addition & Subtraction 1. (8+4i) + (2 – 6i) = 2. (7+3i) – (5+8i) = b. Multiplication 1. (2 – 3i)(4 + 5i) = 2. (5i)(3i)(-4i) =

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Page 1: 5.4 Imaginary and Complex Numbers - mrsespositomrsespositomath.weebly.com/uploads/3/8/1/7/38179709/5_4... · 2018. 10. 17. · Algebra 2 Trig Name_____ 5.4 Imaginary and Complex Numbers

Algebra 2 Trig Name__________________________________

5.4 Imaginary and Complex Numbers

I. Imaginary Numbers

Let i =

So 2i =

3i =

4i =

5i =

II. Complex Numbers: Real vs. Imaginary

III. Operations & Simplifying with Complex Numbers

a. Addition & Subtraction

1. (8+4i) + (2 – 6i) = 2. (7+3i) – (5+8i) =

b. Multiplication

1. (2 – 3i)(4 + 5i) = 2. (5i)(3i)(-4i) =

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