X squared minus9X + 18 equals zero

x^2-9x+18=0

So I'm gonna solve it as if you need to find the x values

So 18 is positive and 9 is negative, so we have to find 2 values that multiply to + 18 but add to a - 9

Which is negative 3 and negative 6. double - = +

(x-3) (x-6)

x intercepts - --> x = 3 x = 6