Math, asked by pizza1o, 1 month ago

find the conjugate of
(2-3i)(5+7i) / (3+2i)(-4-i)

Answers

Answered by ajay8949
1

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \frac{(2 - 3 i)(5 + 7i)}{(3 + 2i)( - 4 - i)}  \\

 \:  \:  \:  \:   \frac{2(5 + 7i) - 3i( 5+ 7i)}{3( - 4 - i) + 2i( - 4 - i)}  \\

 \:  \:  \:  \:  \:  \:  \frac{10 + 14i - 15i - 21 {i}^{2} }{ - 12 - 3i - 8i - 2 {i}^{2} }  \\

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \frac{{10  - i + 21}}{ - 12 - 11i \:  + 2} \\

 \:  \:  \:  \:  \frac{31 - i}{ - 10 - 11i}  \times  \frac{ - 10 + 11i}{ - 10 + 11i}   \\

 \:  \:  \:  \frac{31( - 10 + 11i) - i( - 10 + 11i)}{( - 10) {}^{2} -(11i) {}^{2}   }  \\

  \:  \:  \:  \:  \:  \: \frac{ - 310 + 341i + 10i - 11 {i}^{2} }{100 - 121 {i}^{2} }  \\

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \frac{ - 310 + 351i + 11}{100 + 121}  \\

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \frac{2 9 9 + 351i}{221 }  \\

 \:  \:  \:  \:  \: congugate =  \frac{299}{221} -  \frac{351}{221} i  \\

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