Given the parametric equations: $,x(t)=t^4-2t^2+1$

$y(t)=4t^3-6t$

The equation of the tangent line at $t=\sqrt[\phantom{2}]{2}$ is: $y=\frac{\sqrt[\phantom{2}]{2}}{4}x-\frac{\sqrt[\phantom{2}]{2}}{4}$

What integer value should be placed in the box above?

Answe