Aim of the applet

Get a representation of a second degree inequality, and the range of values of x satisfying the inequality.

Input data

The user must enter the second degree inequality on the menu Define the inequality . You can evaluate the function at a given point on the menu Evaluate at a point.

Output data

• Graphical representation of the parable.
• Range of values that satisfy the inequality and cutoff points with the axis X.
• Graphical representation of the image of the point.

First steps

• Represents the values for which -2x ^ 2 + x + 1 is positive, and negative?
• For what values x + 5 is positive?