To factorise you have to find what multiplies to the number without an x and adds to the number with x What times to 16 and add to 10? 8 and 2 Put these in brackets with x (x+8)(x+2)=0 To find what x is you need to make both bracket equal zero The easy way to do this is to flip the sign x=-8 x=-2 The solutions represent the roots of the graph which is when it crosses the x-axis. The two solutions represent what x would equal when y=0 in this equation.
