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how are the zeros of a polynomial function used to create a graph?

The zeroes of equations give you the X values on a graph

For example,

x + 2 = 0 ⇒ x = –2

It is the only number and is the opposite of what is in the equation

To sketch any polynomial function, you can start by finding the real zeros of the function and end behavior of the function .

Steps involved in graphing polynomial functions:

1 . Predict the end behavior of the function.

2 . Find the real zeros of the function. Check whether it is possible to rewrite the function in factored form to find the zeros. Otherwise, use Descartes' rule of signs to identify the possible number of real zeros.

3 . Make a table of values to find several points.

4 . Plot the points and draw a smooth continuous curve to connect the points.

5 . Make sure that the graph follows the end behavior as found in the above step.

Example:

Graph the polynomial function x3−2x2−3xx3−2x2−3x .

Predict the end behavior of the function.

The degree of the polynomial function is odd and the leading coefficient is positive.

f(x)→−∞, as x→−∞f(x)→+∞, as x→+∞f(x)→−∞, as x→−∞f(x)→+∞, as x→+∞

The degree of the polynomial is 33 and there would be 33 zeros for the functions.

The function can be factored as x(x+1)(x−3)x(x+1)(x−3) . So, the zeros of the functions are x=−1,0x=−1,0 and 33 .

Make a table of values to find several points.

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step-by-step explanation:

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