Try this out guys!
Sample Activity
(Note: A folding procedure is to be use to obtain the roots).
Material: graphing paper, pencil, ruler
What are the real roots of the quadratic function f(x) = x² + 3x -4?
Step 1. Check first if b²≥ 4c. Otherwise the equation has no real roots.
Step 2. On a graphing paper, mark the point (0,1) and label it as A.
Step 3. Mark the point (-b, c) and label it as B.
Step 4. Make a fold passing through A and B. Unfold.
Step 5. Make a fold that bisects the segment AB by superimposing A on B to obtain the midpoint M of AB.
Step 6. Keeping M fixed, make a fold that passes through M while keeping A on a point A1 in the x-axis.
Step 7. The x-coordinate of A1 is a root of the quadratic equation.
Step 8. There maybe a second fold through M that also places A on the x-axis. This will give a second root of the
quadratic function.
The activity was patterned through this link. (View)
