4-1.Complex numbers
medium

यदि $\frac{{3x + 2iy}}{{5i - 2}} = \frac{{15}}{{8x + 3iy}}$,  तो

A

$x = 1,y = - 3$

B

$x = - 1,y = 3$

C

$x = 1,y = 3$

D

$x = - 1,y = - 3$या $x = 1,$$y = 3$

Solution

(d) दिया है $\frac{{3x + 2iy}}{{5i – 2}} = \frac{{15}}{{8x + 3iy}}$

$⇒  24{x^2} + 9ixy – 6{y^2} + 16ixy = 75i – 30$

$⇒  24{x^2} – 6{y^2} + 25ixy = 75i – 30$

वास्तविक एवं काल्पनिक भागों की तुलना करने पर,

$24{x^2} – 6{y^2} =  – 30$या $4{x^2} – {y^2} =  – 5$तथा $xy = 3$

हल करने पर $x =  \pm 1,y =  \pm 3$

Standard 11
Mathematics

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