Maths AA terms: Z

A value of $x$ for which $f(x) = 0$. The zeros of $f$ are the roots of the equation $f(x) = 0$ and the $x$-coordinates of the $x$-intercepts of $y = f(x)$.

The vector $\boldsymbol{0}$ with every component $0$ and magnitude $0$. It has no direction, and $\boldsymbol{v} + \boldsymbol{0} = \boldsymbol{v}$ for every vector $\boldsymbol{v}$.