1.

If x,y,a,b,c,d are real and x+iy= sqrt((a+ib)/(c+id))" then"(x^(2)+y^(2))^(2)=

Answer»

`(a^(2)+B^(2))/(C^(2)+d^(2))`
`(a^(2)-b^(2))/(c^(2)-d^(2))`
`(a^(2)-c^(2))/(b^(2)-d^(2))`
`(a^(2)+b^(2))/((c+d)^2)`

ANSWER :A


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