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Evaluating polynomials

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Foundations of Mathematics and Pre-Calculus 10
8. Polynomial factoring
8.10 Evaluating polynomials

Evaluating Polynomials

Substitute a value for the variable, then simplify using order of operations.


What You'll Learn

Evaluating a polynomial means substituting a value for the variable, then simplifying.
Follow order of operations: exponents, then multiplication, then addition/subtraction.
Example: 2x squared minus 3x plus 1 at x=4 equals 21.
Wrap a negative substitution in parentheses before simplifying.
A skipped order-of-operations step gives a wrong answer even with correct substitution.

What You'll Practice

1

Substituting single values into quadratic and cubic polynomials

2

Evaluating expressions with negative numbers and exponents

3

Working with multi-variable polynomials using given values

4

Applying PEMDAS to simplify polynomial expressions with fractions

Why This Matters

Evaluating polynomials is essential for graphing functions, solving real-world problems, and understanding advanced algebra. This skill builds your foundation for calculus, physics, and engineering where you'll constantly substitute values into formulas and equations.

Before You Start — Make Sure You Can:

This Unit Includes

5 Video lessons
Practice exercises
Learning resources

Skills

Polynomials
Substitution
Order of Operations
PEMDAS
Exponents
Simplification
Multi-variable Expressions
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