The zero of a fucntion is an x-value that makes a function into zero. It can also be called a root of a function of f or an x-intercept. The zero of a function can be found by solving the equation for x. Whatever the x value turns out to be will be the zero of the graph because at that point, if plugged into the function, it will cause the entire graph to be zero. Roots, zeros, and x-intercepts can all be real or complex. An example would be x^2=4. If one was to solve for x, then the square root of 4 would be 2, and that 2 would be the zero of the function.
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