Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

If z \times (3+4i)=2+3i, then the value of z is:

  • Option 1)

    \frac{18-i}{25}

  • Option 2)

    \frac{9+9i}{16}

  • Option 3)

    \frac{18+i}{25}

  • Option 4)

    \frac{5+2i}{9}

 

Answers (1)

best_answer

As we learnt in 

Division of Complex Numbers -

\frac{a+ib}{c+id}=\frac{ac+bd}{c^{2}+d^{2}}+i\frac{bc-ad}{c^{2}+d^{2}}

-

 

 \\Z\times \left ( 3+4i \right )=2+3i\\*\\*Z=\frac{2+3i}{3+4i}=\frac{\left (2+3i \right )\left ( 3-4i \right )}{\left (3+4i \right )\left ( 3-4i \right )}\\*\\*= > \frac{6+9i-8i+12}{25}= > \frac{18+i}{25}


Option 1)

\frac{18-i}{25}

Incorrect

Option 2)

\frac{9+9i}{16}

Incorrect

Option 3)

\frac{18+i}{25}

Correct

Option 4)

\frac{5+2i}{9}

Incorrect

Posted by

Plabita

View full answer

Similar Questions

Trending Articles/News

anam-khan

BITSAT 2026 absentee slot hall ticket out at admissions.bits-pilani.ac.in; exam on April 19
anam-khan

BITS Pilani issues BITSAT 2026 phase 1 hall ticket
anam-khan

BITSAT 2026 City Intimation Slip: BITS Pilani postpones centre allocation; slot booking by March 31

Latest Question