How to Factor Second Degree Polynomials (Quadratic Equations)

Set up your expression., Find the factored form using one of the methods below., Check your work!

3 Steps 1 min read Easy

Step-by-Step Guide

  1. Step 1: Set up your expression.

    The standard format for the quadratic equation is:ax2 + bx + c = 0 Start by ordering the terms in your equation from highest to lowest power, just like this standard format.

    For example, take:6 + 6x2 + 13x = 0 We will re-order this expression so it's easier to work with by simply moving the terms around:6x2 + 13x + 6 = 0 , Factoring the polynomial will result in two smaller expressions which can be multiplied to produce the original polynomial:6x2 + 13x + 6 = (2x + 3)(3x + 2) In this example, (2x +3) and (3x + 2) are factors of the original expression, 6x2 + 13x +
    6. , Multiply the factors you identified.

    Then combine like terms and you're done.

    Start with:(2x + 3)(3x + 2) Let's test it, multiplying the terms using FOIL (first
    - outer
    - inner
    - last), obtaining:6x2 + 4x + 9x + 6 From here, we can add 4x and 9x together since they're like terms.

    We know our factors are correct because we get the equation we started with:6x2 + 13x + 6
  2. Step 2: Find the factored form using one of the methods below.

  3. Step 3: Check your work!

Detailed Guide

The standard format for the quadratic equation is:ax2 + bx + c = 0 Start by ordering the terms in your equation from highest to lowest power, just like this standard format.

For example, take:6 + 6x2 + 13x = 0 We will re-order this expression so it's easier to work with by simply moving the terms around:6x2 + 13x + 6 = 0 , Factoring the polynomial will result in two smaller expressions which can be multiplied to produce the original polynomial:6x2 + 13x + 6 = (2x + 3)(3x + 2) In this example, (2x +3) and (3x + 2) are factors of the original expression, 6x2 + 13x +
6. , Multiply the factors you identified.

Then combine like terms and you're done.

Start with:(2x + 3)(3x + 2) Let's test it, multiplying the terms using FOIL (first
- outer
- inner
- last), obtaining:6x2 + 4x + 9x + 6 From here, we can add 4x and 9x together since they're like terms.

We know our factors are correct because we get the equation we started with:6x2 + 13x + 6

About the Author

J

Jeffrey Powell

Enthusiastic about teaching hobbies techniques through clear, step-by-step guides.

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