Mark is solving the equation 4x^2 = 12x - 9 using the quadratic formula.
which values could he use for a, b and c?
a = 4, b = 12, c = -9
a = 4, b = -9, c = 12
a = 4, b = 9, c = -12
a = 4, b = -12, c = 9

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