Completing the square and solving using exact values-DESMOS

This DESMOS resource has 10 questions that checks students’ understanding of completing the square and then solving.

The resource is great for formative assessment and will give the teacher feedback in real time on the understanding of the whole class.

Students need to know how to write exact values and in the last 2 examples need to fully simplify surds.

When the student types in their answer a graph will be drawn over a dotted curve, giving the student a visual representation of their answer. When they type in the correct roots a tick will appear on the graph.

You may need to remind the students to type in the roots into the correct cell in the table.