For what x expression
4x2163x26x\dfrac{ 4x2-16}{ 3x2 -6x}
equals zero?

Correct result:

x =  -2


4x2163x26x=4(x2)(x+2)3x(x2) x2x0 x=2\dfrac{ 4x^2-16}{ 3x^2 -6x} = \dfrac{ 4(x-2)(x+2) }{ 3x (x-2) } \ \\ x \ne 2 \wedge x\ne 0 \ \\ x = -2

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