Which system of equations can be used to find the roots of the equation 12 x 3-5x=2 x 2+x+6

a. y = 12x3-5x

y=2x2+x+6

b. y=12x3-5x+6

y=2x2+x

c. y=12x3+2x2-4x

y=6

d. y=12x3+2x2-4x+6

y=0

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