Not factoring quadratic expressions

Oct 13, 2025 by talynt.org 142 views

Introduction

In algebra, simplifying expressions is a crucial skill that helps us solve equations and inequalities. In this article, we will focus on simplifying a given expression involving fractions and polynomials. We will break down the problem into manageable steps and provide a clear explanation of each step.

The Given Expression

The given expression is:

\frac{a^2 - 2a + 1}{6} + (a^2 - 1)

Our goal is to simplify this expression and find the denominator of the resulting fraction.

Step 1: Factor the Quadratic Expression

The first step is to factor the quadratic expression $a^2 - 2a + 1$ . We can rewrite it as:

(a - 1)^2

This is a perfect square trinomial, and we can factor it as the square of a binomial.

Step 2: Simplify the Expression

Now that we have factored the quadratic expression, we can simplify the given expression:

\frac{(a - 1)^2}{6} + (a^2 - 1)

We can rewrite the second term as:

(a^2 - 1) = (a - 1)(a + 1)

Now, we can substitute this expression into the original expression:

\frac{(a - 1)^2}{6} + (a - 1)(a + 1)

Step 3: Combine Like Terms

The next step is to combine like terms. We can rewrite the expression as:

\frac{(a - 1)^2}{6} + (a - 1)(a + 1) = \frac{(a - 1)^2 + 6(a - 1)(a + 1)}{6}

We can simplify the numerator by combining like terms:

(a - 1)^2 + 6(a - 1)(a + 1) = (a - 1)^2 + 6(a^2 - 1)

Expanding the squared term, we get:

(a - 1)^2 = a^2 - 2a + 1

Substituting this expression into the numerator, we get:

(a^2 - 2a + 1) + 6(a^2 - 1)

Combining like terms, we get:

7a^2 - 12a + 5

Step 4: Simplify the Expression

Now that we have simplified the numerator, we can rewrite the expression as:

\frac{7a^2 - 12a + 5}{6}

This is the simplified expression.

Conclusion

In this article, we simplified a given expression involving fractions and polynomials. We broke down the problem into manageable steps and provided a clear explanation of each step. We factored the quadratic expression, simplified the expression, combined like terms, and finally simplified the expression. The resulting expression is:

\frac{7a^2 - 12a + 5}{6}

The denominator of the resulting fraction is 6.

Final Answer

Q&A: Simplifying Algebraic Expressions

In the previous article, we simplified a given expression involving fractions and polynomials. In this article, we will answer some common questions related to simplifying algebraic expressions.

Q: What is the first step in simplifying an algebraic expression?

A: The first step in simplifying an algebraic expression is to identify the like terms and combine them. This involves rewriting the expression in a way that makes it easier to simplify.

Q: How do I factor a quadratic expression?

A: To factor a quadratic expression, you need to look for two numbers whose product is the constant term and whose sum is the coefficient of the linear term. These two numbers are the roots of the quadratic equation.

Q: What is the difference between a perfect square trinomial and a non-perfect square trinomial?

A: A perfect square trinomial is a quadratic expression that can be factored as the square of a binomial. For example, $(a - 1)^2$ is a perfect square trinomial. A non-perfect square trinomial is a quadratic expression that cannot be factored as the square of a binomial.

Q: How do I simplify an expression with fractions?

A: To simplify an expression with fractions, you need to find a common denominator and combine the fractions. This involves rewriting each fraction with the common denominator and then adding or subtracting the numerators.

Q: What is the final step in simplifying an algebraic expression?

A: The final step in simplifying an algebraic expression is to check your work and make sure that the expression is in its simplest form. This involves checking that all like terms have been combined and that the expression cannot be simplified further.

Common Mistakes to Avoid

When simplifying algebraic expressions, there are several common mistakes to avoid. These include:

Not combining like terms: Failing to combine like terms can make the expression more complicated than it needs to be.
Not factoring quadratic expressions: Failing to factor quadratic expressions can make it difficult to simplify the expression.
Not finding a common denominator: Failing to find a common denominator can make it difficult to combine fractions.
Not checking your work: Failing to check your work can lead to errors in the final answer.

Tips and Tricks

When simplifying algebraic expressions, there are several tips and tricks to keep in mind. These include:

Use a systematic approach: Use a systematic approach to simplify the expression, such as combining like terms first and then factoring quadratic expressions.
Check your work: Check your work carefully to make sure that the expression is in its simplest form.
Use a calculator: Use a calculator to check your work and make sure that the expression is in its simplest form.
Practice, practice, practice: Practice simplifying algebraic expressions to become more comfortable with the process.

Conclusion

In this article, we answered some common questions related to simplifying algebraic expressions. We discussed the first step in simplifying an algebraic expression, factoring quadratic expressions, simplifying expressions with fractions, and the final step in simplifying an algebraic expression. We also discussed common mistakes to avoid and tips and tricks to keep in mind when simplifying algebraic expressions.