For each polynomial function, use the remainder theorem to find ƒ(k). ƒ(x) = 2x² - 3x-3; k = 2

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Recall the Remainder Theorem: For a polynomial function ƒ(x), the remainder when ƒ(x) is divided by (x - k) is equal to ƒ(k). This means to find ƒ(k), you simply substitute k into the polynomial.

Write down the given polynomial function: \(ƒ(x) = 2x^2 - 3x - 3\) and the value \(k = 2\).

Substitute \(x = 2\) into the polynomial: \(ƒ(2) = 2(2)^2 - 3(2) - 3\).

Simplify the expression step-by-step: First calculate the square, then multiply, and finally perform the addition and subtraction.

The simplified result after substitution is the value of \(ƒ(2)\), which is the remainder when dividing by \((x - 2)\) according to the Remainder Theorem.

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주요 개념

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Polynomial Functions

A polynomial function is an expression consisting of variables and coefficients combined using addition, subtraction, and multiplication, with non-negative integer exponents. Understanding the structure of polynomials helps in evaluating them at specific values and applying related theorems.

Remainder Theorem

The Remainder Theorem states that when a polynomial ƒ(x) is divided by (x - k), the remainder is equal to ƒ(k). This allows us to find the value of the polynomial at x = k by simply evaluating ƒ(k), without performing full polynomial division.

Evaluating Polynomials at a Given Value

Evaluating a polynomial at a specific value involves substituting the variable with that value and simplifying. This process is essential for applying the Remainder Theorem and finding the remainder or function value efficiently.

For each polynomial function, use the remainder theorem to find ƒ(k). ƒ(x) = 2x2 - 3x-3; k = 2