Here are the essential concepts you must grasp in order to answer the question correctly.
Synthetic Division
Synthetic division is a simplified method for dividing a polynomial by a linear binomial of the form (x - k). It involves using the coefficients of the polynomial and performing a series of multiplications and additions to find the quotient and remainder. This technique is particularly useful for quickly determining if a given value k is a root of the polynomial, as the remainder will indicate whether ƒ(k) equals zero.
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Polynomial Function
A polynomial function is a mathematical expression involving a sum of powers in one or more variables multiplied by coefficients. In this case, the polynomial function is ƒ(x) = x² + 2x - 8, which is a quadratic function. Understanding the structure of polynomial functions is essential for analyzing their roots, behavior, and how they can be evaluated at specific points.
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Evaluating a Function
Evaluating a function involves substituting a specific value for the variable in the function's expression to find the corresponding output. For the polynomial function ƒ(x), evaluating it at k = 2 means calculating ƒ(2) = 2² + 2(2) - 8. This process is crucial for determining whether k is a zero of the polynomial, as a zero indicates that the function's value at that point is zero.
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