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anonymous

  • 5 years ago

simplify (9+4i)(-3-2i)(2-2i) i have nooo idea how to do this!

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  1. anonymous
    • 5 years ago
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    Foil two at a time then multiply that answer by last one i^2=-1

  2. anonymous
    • 5 years ago
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    First Outer Inner Last

  3. anonymous
    • 5 years ago
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    take an i out and then mulitply them all together...i think

  4. anonymous
    • 5 years ago
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    (9+4i)(-3-2i) FIRST 9*-3=-27 OUTER 9*-2i=-18i INNER 4i*-3=-12i LAST 4i*-2i=8

  5. anonymous
    • 5 years ago
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    -8i^2=-8*-1=8

  6. anonymous
    • 5 years ago
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    (9 + 4i)(-3 - 2i) = -27 - 18i - 12i - 8i^2 -27 - 18i - 12i + 8 because i^2 = -1 -19 - 30i now (-19 - 30i)(2 - 2i) -38 + 38i - 60i - 60 -98 - 22i

  7. anonymous
    • 5 years ago
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    GREAT!

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spraguer (Moderator)
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