Algebra- functions

How do I find the solutions and factors of a function when given only the graph?

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  1. Use the graph to find the zeroes of the function. So, you find the points at which the function crosses the x-axis.

    If f(x)=0 for x = x1, x = x2, x = x3, then:

    f(x) = (x-x1)(x-x2)(x-x3) g(x)

    where g(x) has no zeroes.

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