Set the equation equal to zero. For example, take the function
F(x) = x^2 - 4
Find the zeroes by
x^2 - 4 = 0
x^2 = 4
sqrt(x^2) = sqrt(4)
x = +/- 2
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no a plynomial can not have more zeros than the highest (degree) number of the function at leas that is what i was taught. double check the math.
If there is one variable. Then put each variable equal to zero and then solve for the other variable.
To find the zeros of a function using a TI-30X calculator, first, enter the function into the calculator using the appropriate mode (usually in "function" mode). Then, use the "Table" feature to generate values of the function. Look for where the function changes signs, indicating a zero. You can then estimate the zero by narrowing down the interval around the point where the sign change occurs. Note that the TI-30X does not have a built-in root-finding feature, so you might need to use a graphing calculator for more precise results.
For an algebraic function in one variable, as many as the highest power of the variable.