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Which of the following polynomials does not have real roots? A.x2 - 17x - 7 B.-x2 4x 6 C.2x2 - 13 D.x2 4x 8
To determine if the roots are real, just determine if the discriminant is positive or negative. Negative square root means an imaginary root. \(b^2-4ac\) negative = imaginary; positive = real