Table of contents

0. Review of Algebra4h 18m
1. Equations & Inequalities3h 18m
2. Graphs of Equations43m
3. Functions2h 17m
4. Polynomial Functions1h 44m
5. Rational Functions1h 23m
6. Exponential & Logarithmic Functions2h 28m
7. Systems of Equations & Matrices4h 6m
8. Conic Sections2h 23m
9. Sequences, Series, & Induction1h 22m
10. Combinatorics & Probability1h 45m

0. Review of Algebra

Factoring Polynomials

College Algebra

0. Review of Algebra

Factoring Polynomials

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1:17 minutes

Problem 43

Textbook Question

In Exercises 1–68, factor completely, or state that the polynomial is prime. x² + 10x − y² + 25

Verified step by step guidance

Identify the polynomial: \(x^2 + 10x - y^2 + 25\).

Rearrange the terms to group them: \((x^2 + 10x + 25) - y^2\).

Recognize that \(x^2 + 10x + 25\) is a perfect square trinomial, which can be factored as \((x + 5)^2\).

Rewrite the expression using the difference of squares formula: \((x + 5)^2 - y^2\).

Apply the difference of squares formula: \((a^2 - b^2) = (a - b)(a + b)\), where \(a = (x + 5)\) and \(b = y\), resulting in \((x + 5 - y)(x + 5 + y)\).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Factoring Polynomials

Factoring polynomials involves rewriting a polynomial expression as a product of simpler polynomials. This process is essential for simplifying expressions and solving equations. Common techniques include factoring out the greatest common factor, using special products like the difference of squares, and applying the quadratic formula when necessary.

Difference of Squares

The difference of squares is a specific factoring pattern that applies to expressions of the form a² - b², which can be factored into (a + b)(a - b). In the given polynomial, recognizing the presence of a difference of squares can simplify the factoring process, especially when combined with other terms.

Completing the Square

Completing the square is a method used to transform a quadratic expression into a perfect square trinomial. This technique is useful for factoring and solving quadratic equations. In the context of the given polynomial, it can help identify the structure of the expression and facilitate the factoring process.