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If Delta (x) =|{:(x^(2)=5x+3,2x-5,3),(3x...

If `Delta (x) =|{:(x^(2)=5x+3,2x-5,3),(3x^(2)=x+4,6x-1,9),(7x^(2)=6x+9,14x-6,21):}|`
=`ax^(2) +bx^(2)+cx+d`, then

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