October 13th Warm up with partners

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Presentation transcript:

October 13th Warm up with partners Real & imaginary part; pure imaginary # has no real part complex #’s real #’s imaginary #’s irrational #’s rational #’s 5 – 6i 5,-2,0.7,1/2,1/3 Non-repeating decimals Repeating & terminating decimals too Give examples & define each type of #.

Go over quiz #2

Important to know all of these….. 1 -1 -1i = -i 1

Imaginary Number Review from Alg 2: 1) 2) 1) 2) 4) 5) 4i bi 8 + i 2i + 7i = 9i 2i (5i) = 10i2 = -10 Take the i out first

Let’s practice arithmetic with complex numbers….. (2 + 3i) – (4 – 6i) 7) 3i(6 – 7i) 8) (5 – 4i)(-4 + 6i) 9) (2 + 3i)(5 – 3i) -2 + 9i 21 + 18i 4 + 46i Foil, combine like terms… Be sure your answer is in standard form!!! 19 + 9i

Homework WS 3-7