Answer
Zero: $\dfrac{1}{4}$
$x$-intercept: $\dfrac{1}{4}$
Work Step by Step
To find the zeros of a function $f$, solve the equation $f(x)=0$
The zeros of the function are also the $x-$intercepts.
Let $g(x)=0$:
$$16x^2-8x+1=0$$
By Factoring
$$(4x-1)^2=0$$
$$ 4x-1 =0$$
$$4x=1$$
$$x=\dfrac{1}{4}$$
Thus, the zero, which is also the $x$-intercept, is $\dfrac{1}{4}$