[" If the rools of the quadratic equatio...

[" If the rools of the quadratic equation "ax^(2)+bx+c=0" are imaginary then for all values of a,"],[x in R," the expression a "^(2)x^(2)+abx+" ac is ".],[[" (A) posilive "," (B) non-negative "],[" (C) negative "," (D) may be positive,zero or negative "]]

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