Defining half-planes – a simple case Student activity Play

Defining inequalities in a coordinate system Student activity Play

Defining inequalities in a coordinate system Simulation Play

Defining inequality in a coordinate system Simulation Play

Derivative of the quadratic function Animation Play

Derivative of the quadratic function Whiteboard exercise Play

Derivative of the quadratic function Student activity Play

Describing class intervals Student activity Play

Describing class intervals – speed of light Whiteboard exercise Play

Describing regions on the plane using inequalities Whiteboard exercise Play

Discriminant of the quadratic equation Whiteboard exercise Play

Discs in the coordinate system Student activity Play

'Double quadratic' equations Student activity Play

'Double quadratic' equations Whiteboard exercise Play

Equation of a quadratic function Whiteboard exercise Play

Estimation of the roots of a quadratic equation Whiteboard exercise Play

Estimation of the roots of a quadratic equation Whiteboard exercise Play

Estimation of the roots of a quadratic equation Student activity Play

Estimation of the roots of a quadratic equation – example Animation Play

Estimation of the roots of a quadratic equation – example Animation Play

Example of a quadratic function Animation Play

Example of solving linear inequality with the parameter Animation Play

Example of the transformation of an equation into a quadratic equation Animation Play

Examples of quadratic equations Student activity Play

Examples of quadratic equations Whiteboard exercise Play