15. Your classmate answered that nature of the roots of a quadratic equation
which has the value of -9 is rational and not equal. Is the answer correct?
A. Yes, because -9 is a perfect square
B. Yes, because the discriminant is -9
C. No, because -9 is not a perfect square
D. No, because -9 is less than zero and no real roots
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Answer:
a. yes, because -9is a perfect square