4. You may need to solve them using graphs.
Look at the 'x' values on the graph paper given to find out what values you should work out the equation for.
Write these in a table, the values will usually be from -3 to 3 or something similar.
Where the graph crosses the x-axis will be the values to your equation. A straight line graph will only give you one value, however you may be asked to draw a quadratic graph and a straight line, the points where these two cross gives you your values.
An x^2 graph = dip
An x^3 graph = 'S'
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