Question
यदि $x + iy = \sqrt {\frac{{a + ib}}{{c + id}}} ,$तो ${({x^2} + {y^2})^2} = $
$⇒ x - iy = \sqrt {\frac{{a - ib}}{{c - id}}} $
${x^2} + {y^2} = (x + iy)(x - iy) = \sqrt {\frac{{{a^2} + {b^2}}}{{{c^2} + {d^2}}}} $
${({x^2} + {y^2})^2} = \frac{{{a^2} + {b^2}}}{{{c^2} + {d^2}}}$
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