Factorise x^3-6x^2+9x.
x^3-6x^2+9x=x(x^2-6x+9)
observe binomial formula (x-3)^2=(x^2-6x+9)
Thus x(x-3)^2 and the function has two points meeting the x-axis.
EG
x^3-6x^2+9x=x(x^2-6x+9)
observe binomial formula (x-3)^2=(x^2-6x+9)
Thus x(x-3)^2 and the function has two points meeting the x-axis.
