Fraction

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

Correct result:

x =  -2

Solution:

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

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