# Examine 2nd degree equations

- Author:
- Saskia van Heeswijk

- Topic:
- Equations

## Examine 2nd degree equations

The graph you see is the graph of
a, b and c all have a value of 1 to start with
1) Use the sliders to see the graph of
a) At what points does this graph coincide with the x-axis?
b) Can you prove that these points are correct by factorising the expression?
3) Use the sliders to see the graph of ?
a) At what points does this graph coincide with the x-axis?
b) Determine the exact points where y=0 for this expression
5) What happens if you make a larger? can you explain this?
6) What happens if you make b larger? can you explain this?
7) What happens if a is a negative number? can you explain this?