6) What is the value of b² — 4ac if the values of a,b and c are 2,-11 and 12 perspectively
A. -25
B. 25
C. 217
D. -217

7). What is the sum of the roots of the quadratic equation 2x² + 4x – 6 = 0?
A. 2
B. -2
C. 3
D. -3

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