pls answer w explanation! What is the product of the complex numbers 2 + 6i and 2 – 6i? (Note: i= √-1)

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pls answer w explanation!

What is the product of the complex numbers 2 + 6i and 2 – 6i? (Note: i= √-1)

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Gerda 6 months 2021-07-24T02:34:05+00:00 1 Answers 2 views 0

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    2021-07-24T02:36:02+00:00

    Answer:

    10

    Step-by-step explanation:

    Apply difference of squares.

    (x + y)(x - y) =  {x}^{2}  -  {y}^{2}

    (2 + 6i)(2 - 6i) =  {2}^{2}   -  {6i}^{2}

     = 4 + 6

     = 10

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )