Math Problem Statement

What is p(5) for the polynomial function p(x) = x^3 + 7x^2 - 20x - 110?

Solution

In this image, the problem is asking to evaluate p(5)p(5), where the polynomial function p(x)=x3+7x220x110p(x) = x^3 + 7x^2 - 20x - 110 is given. We can use synthetic or direct substitution to calculate p(5)p(5).

Given that the long division in the image shows the polynomial being divided by (x5)(x - 5), we can conclude that x=5x = 5 is a root of the polynomial. This means p(5)=0p(5) = 0.

Therefore, p(5)=0p(5) = 0.

Would you like more details on how to perform synthetic division or further explanation of polynomial evaluation?

Here are 5 related questions to deepen understanding:

  1. How does synthetic division differ from long division for polynomials?
  2. Why does the remainder of the division indicate the value of p(5)p(5)?
  3. What does it mean if a number is a root of a polynomial function?
  4. How can we factor polynomials after finding a root?
  5. How do we use the remainder theorem to evaluate polynomial functions?

Tip: The remainder theorem states that the remainder when a polynomial p(x)p(x) is divided by (xa)(x - a) is p(a)p(a).

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Math Problem Analysis

Mathematical Concepts

Polynomial Division
Remainder Theorem
Polynomial Evaluation

Formulas

p(x) = x^3 + 7x^2 - 20x - 110
Remainder Theorem: p(a) = R, where R is the remainder when p(x) is divided by (x - a)

Theorems

Remainder Theorem

Suitable Grade Level

Grades 9-12