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adam124

  • 3 years ago

multiply (2+5i)(5-2i)

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  1. neel2210
    • 3 years ago
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    21i

  2. AgarshnaMurari
    • 3 years ago
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    The answer is 20+21i.

  3. AgarshnaMurari
    • 3 years ago
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    Rate if u like:)

  4. satellite73
    • 3 years ago
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    \[(a+bi)(c+di)=(ac-bd)+(ad+bc)i\]

  5. satellite73
    • 3 years ago
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    \[2 \times 5 - 5 \times (-2)=20\] \[2 times (-2)+5 \times 5=21\]

  6. satellite73
    • 3 years ago
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    so answer is 20 + 20i as agarshna said.

  7. neel2210
    • 3 years ago
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    sorry calculation mistake its 20+21i

  8. radar
    • 3 years ago
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    Multiply through getting 10 +25i-4i-10i^2 Consolidate similar terms: 10+21i-10i^2 Take care of the last term as i^2 us equal to a -1 so the last term is 10 final answer is 21i+20

  9. radar
    • 3 years ago
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    or placing the real term first: 20+21i

  10. radar
    • 3 years ago
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    Any questions regarding the procedure for obtaining the solution?

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