Integrated Publishing
Integrated Publishing: Graphical Solution
This site explains how graphing can be used to solve (find the roots of) a quadratic equation. Practice problems are included.
Cool Math
Coolmath: Solving Quadratics Recap
This CoolMath resource reviews the ways to solve quadratic equations: factoring, finding square roots, and using the quadratic formula.
Cool Math
Coolmath: Pre Calculus Freaky Factoring
This CoolMath resource provides a review of factoring polynomials and an introduction to factoring exponents that are fractions.
Cool Math
Coolmath: Rational Functions Intercepts
This CoolMath resource will help students understand intercepts, a rational function.
Khan Academy
Khan Academy: Features of Quadratic Functions
Find the zeroes ('roots') of quadratic functions and the vertex of their parabolas. Functions are given in standard, vertex, and factored form.
Khan Academy
Khan Academy: Features of Quadratic Functions: Strategy
Identify the form of a quadratic function that immediately reveals a given feature of that function. Features in question are the y-intercept of the graph, the zeroes ('roots') of the function, and the vertex of the parabola.
CK-12 Foundation
Ck 12: Algebra Ii: 1.4 Characteristics of Polynomial Graphs
This lesson explores graphs of polynomial equations including how to find the maximum and minimum y-values on a polynomial function.
Khan Academy
Khan Academy: Zeros of Polynomials (Factored Form)
Select the graph that best suits a polynomial equation by considering the zeros of the polynomial using this four-question quiz.
Cuemath
Cuemath: Quadratic Equations
A comprehensive guide for learning all about quadratic equations with definitions, quadratic formulas, how to solve them, solved examples, and practice questions.
Help Algebra
Help algebra.com: Completing the Square
The process of completing the square is presented with a detailed description of the process and an example to show the work step by step. An example with a non-integer leading coefficient is also included.
Help Algebra
Help algebra.com: Quadratic Equations
After defining a quadratic equation, this site shows you what the graphs of quadratics look like and how to use the graphs to determine the numbers of solutions to the quadratic. A brief explanation is included on how graphing...
Help Algebra
Help algebra.com: Solving Quadratics by Factoring
Tips for factoring quadratics are given and demonstrated in several examples. The examples include quadratics that have both two and three terms.
Help Algebra
Helpalgebra: Geometrical Approach to Completing Square
Using geometrical diagrams, the process of completing the square is demonstrated. Applying this visual approach will help to see why the process works.
Math Notes and Math Tests
Pre Calculus Notes: The "Qf" Method for Factoring Quadratics [Pdf]
Learners examine the quadratic formula method for factoring quadratics. Examples with detailed solutions are included.
Math Notes and Math Tests
Pre Calculus Notes: Finding Zeros of Polynomial Functions [Pdf]
Students learn how to find the zeros of a polynomial function. Topics include rational zero test, factoring, and conjugate pairs of zeros. Techniques and examples are included
Math Notes and Math Tests
Pre Calculus Notes: Polynomial and Rational Functions [Pdf]
The resource discusses quadratic functions. Topics examined are parabolas, the vertex, the axis of symmetry, and standard form.
Mathematics Archives
Math Archives: Visual Calculus: Rational Functions
An explanation of what comprises the domain of a rational function. The information is brief, but formulas and examples are given along with additional links.
Windstream
Ojk's Precalculus Study Page: Solving Polynomial Equations
A comprehensive look at the three main ways to find the roots of a polynomial: factoring, formulas, and the rational root theorem.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Quadratic Function (Changing Coefficients)
The Dr. gives information about a method for deciding how changing the coefficients of a quadratic function affects a graph. The page also leaves some questions for the reader to ponder.
Quia
Quia: Graphing Quadratic Functions
Jeopardy type of a game will ask students to practice working with the three forms of quadratic equations. Can they: identify the form of equation, find the vertex, find the x-intercepts, identify what the graph looks like?
ClassFlow
Class Flow: Quadratics Zeros
[Free Registration/Login Required] Graph parabolas and discover the zeros. Calculate the roots by factoring.
Wyzant
Wyzant: Factoring Calculator
The calculator factors expressions by expanding and combining like terms, dividing a greatest common factor, and identifying between two squares or factorable trinomials. An example expression and quick-start guide are included.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Factoring Monomials
Find a quick, concise explanation of how to factor monomials. An example is given and clearly explained.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Hyperbolas
Find a quick, concise explanation of hyperbolas. An example is given and clearly explained.