Based on your observation for Category 4 graphs in your worksheet, at which values do you think these graphs will cut the x-axis?
a) y=(x-3)(x+1)
b) y=(2x-1)(x-5)
c) y=(3x+2)(x-2)
Similary in Activity 6, what has the equation of the graph y=(x-3)(x+1) got to do with the solving of the equation (x-3)(x+1)=0? How does this link to the values at which the graph cuts the x-axis?
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