7. Where the graph crosses the line \({y}\) = 0 we will have our solutions. As the graph is quadratic we can see that the line crosses the \({x}\)-axis twice, once at \({x}\) = -7 and once at \({x}\) ...

Save guides, add subjects and pick up where you left off with your BBC account. Curved graphs can be used to solve equations. The points at which the curve crosses a particular line on the graph ...