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23 March, 23:50

What is the standard form of (7-5i) (2+3i)

A. 29+11i

B. - 29+11i

C. - 11+29i

D. 11-29i

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Answers (1)
  1. 24 March, 00:09
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    A

    Step-by-step explanation:

    (7-5i) (2+3i) = 7 * (2+3i) - 5i * (2+3i)

    = 7*2 + 7*3i - 5i*2 - 5i*3i

    = 14 + 21i - 10i - 15i² {i² = - 1}

    = 14 + 21i - 10i - 15 * (-1)

    = 14 + 11i + 15

    = 29 + 11i
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