# Quadratic Equations and Parabolas

- Author:
- Greg Drury

## Solution 1

Adjust the slider for solution 1 until the parabolas both cut the x-axis at -2. What is the value of solution 1?

## Solution 2

Now adjust the slider for solution 2 until the parabolas are exactly matched. What is the value of solution 2?

## Create your own parabola

Type the following into the Algebra Input window below:
f(x) = (x-3)(x+3)

## Solutions for f(x) = 0

What are the two possible solutions for f(x) = 0?

## Y-intercept

Give the co-ordinates of the y-intercept of this parabola.