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19 September, 10:17

What is equivalent to (4+5i) (4-5i)

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  1. 19 September, 10:31
    0
    16-25i because you have to find like terms and since there are parenthesis you have to mutiply the like terms
  2. 19 September, 10:45
    0
    (4+5i) (4-5i) = (4) ² - (5i) ²=16-25 (i) ²=16-25 (-1) = 16+25=41
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