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[" 1f "7" and "2" are two roots of the e...

[" 1f "7" and "2" are two roots of the equation "|[2,x,2],[7,6,x]|=0" then the third "],[[" root is "],[[" (a) "-9," (b) "14," (c) "0.05," (d) N.O.T "]]]

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