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Completing the Square Using GeoGebra
     You can use GeoGebra to complete the square of a quadratic expression, using either CAS or Algebra View. 
     GeoGebra Instruction 1
- 1.
-          Open         Algebra VieworCASunderViewinMenu.
- 2.
- Type CompleteSquarein an empty row. Then you’ll see the following:CompleteSquare(<Quadratic Function>) 
- 3.
- Enter your expression where it says <Quadratic Function>and pressEnter.
- 4.
- If you type         CompleteSquare(<Quadratic Function>) in CAS, you can choose to get the exact value written with fractions.