# Write a quadratic equation with given roots

Due to the nature of the mathematics on this site it is best views in landscape mode. If your device is not in landscape mode many of the equations will run off the side of your device should be able to scroll to see them and some of the menu items will be cut off due to the narrow screen width. Equations of Planes In the first section of this chapter we saw a couple of equations of planes. However, none of those equations had three variables in them and were really extensions of graphs that we could look at in two dimensions. Writing Linear Equations Given Slope and a Point When you are given a real world problem that must be solved, you could be given numerous aspects of the equation.

If you are given slope and the y-intercept, then you have it made. You have all the information you need, and you can create your graph or write an equation in slope intercept form very easily. However, most times it's not that easy and we are forced to really understand the problem and decipher what we are given.

It could be slope and the y-intercept, but it could also be slope and one point or it could be just two points. If you are given slope and a point, then it becomes a little trickier to write an equation.

Although you have the slope, you need the y-intercept. You have enough information to find the y-intercept, but it requires a few more steps. Let's look at an example. You must always know the slope m and the y-intercept b.

Writing Equations Given Slope and a Point Write the equation of a line, in slope intercept form, that passes through the point 6, -3 with a slope of Let's first see what information is given to us in the problem.

We'll record this information in the chart below to keep it organized. Notice that in the chart, the 2 grey sections slope and y-intercept are the two numbers that we need in order to write our equation.

## Algebra Examples | Quadratic Equations | Finding the Quadratic Equation Given the Solution Set

We know the slope and a point x,y. We can use this information to solve for b. Then we can write our equation. Then you will solve for b. Now we know the slope m is -2 because that was given to us.

We also now know the y-intercept bwhich is 9 because we just solved for b. We can now write our equation! Since you are so awesome at solving equations, I'm sure this wasn't too painful. Now let's look at a real world applications of this skill. Here you will have to read the problem and figure out the slope and the point that is given.Improve your math knowledge with free questions in "Write a polynomial from its roots" and thousands of other math skills. Write an equation from the Roots Find the equation of a quadratic function that has the following numbers as roots: a and b y x x ab The process is the same if a and b are complex conjugates!

Write a quadratic equation in standard form with the given root(s). ±8, 5 62/87,21 Write the pattern. Replace p and q with ±8 and 5. Follow us: Share this page: This section covers: Implicit Differentiation; Equation of the Tangent Line with Implicit Differentiation; Related Rates; More Practice; Introduction to Implicit Differentiation.

## Polynomial Roots -- from Wolfram MathWorld

Online homework and grading tools for instructors and students that reinforce student learning through practice and instant feedback. Find the Quadratic Equation and are the two real distinct solutions for the quadratic equation, which means that and are the factors of the quadratic equation.

Expand using the FOIL Method.

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