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If one of the roots of $\begin {vmatrix} 3 & 5 & x \\ 7 & x & 7 \\ x & 5 & 3 \end {vmatrix}=0$ is $-10,$ then the other roots are :

\[\begin {array} {1 1} (1)\;3,7 & \quad (2)\;4,7 \\ (3)\;3,9 & \quad (4)\;3,4 \end {array}\]

1 Answer

(1) 3,7
answered Nov 7, 2013 by pady_1
 

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