Write each equation in standard form and identify a, b, and c. 5x2 + 12x - 15 = 0
A. a = 5, b = -12, c = -15
B. a = 5, b = 12, c = 15
C. a = 5, b = -12, c = 15
D. a = 5, b = 12, c = -15
Answer: D
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