How do you figure out the equation of a graph with these points along the x axis?

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Simply multiply the three sets together.

First: (x+1)(x-1) = X^2-1

Next: (X^2-1)(x-2) = X^3-2X^2-x+2

Then: Since we were told these are points along the x-axis, we know the equation is equal to zero; thus: x^3-2X^2-x+2=0 ..... that's the equation.

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