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If x-iy= sqrt((a-ib)/(c-id)), prove that...

If `x-iy= sqrt((a-ib)/(c-id))`, prove that `x^(2)+y^(2)=(a^(2)+b^(2))/(c^(2)+d^(2))`.

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NEW JOYTHI PUBLICATION-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-QUESTIONS FROM COMPETITIVE EXAMS
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  7. If x satisfies x^(2)-2x cos theta +1=0, then the value of x^(n)+((1)/(...

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  8. The value of [((-1+isqrt(3)))/(2)]^(3n)+[((-1-isqrt(3)))/(2)]^(3n) is

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  10. If 4=5i is a root of the quadratic equation x^(2)+ax+b=0, then (a,b)=

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  11. If alpha" and "beta are the roots of the quadratic equation 4x^(2)+3x+...

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  12. If alpha" and "beta are the roots of ax^(2)+bx+c=0 and alpha+k, beta+k...

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  13. If 3p^(2)=5p+2" and "3q^(2)= 5q+2, where p ne q, then the equation wh...

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  14. The value of ((-1+sqrt(-3))/(2))^(26)+((-1-sqrt(-3))/(2))^(26) is

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  15. If (sqrt(3)-i)^(50)= 2^(48)(x-iy), then x^(2)+y^(2) is equal to

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  16. The value of (i^(592)+i^(590)+i^(588)+i^(586)+i^(584))/(i^(582)+i^(580...

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  17. If |(z-i)/(z+i)|=1, then the locus of z is

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  18. The condition that one root of the equation ax^(2)+bx+c=0 may be squar...

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  19. If alpha is one root of the equation 4x^(2)+2x-1=0, then the other roo...

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  20. If the roots of the equation (a)/(x-a)+(b)/(x-b)=1 are equal in magnit...

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  21. The equation of smallest degree with real coefficients having 2+i3 as ...

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