Extra points to brainiest !
a quadratic equation is written in four equivalent forms below.
i. y = x(x - 6) + 8
ii. y = (x - 3)^2 - 1
iii. y = x^2 - 6x + 8
iv. y = (x - 2)(x - 4)
which of the forms shown above would be the most useful if attempting to find the x-intercepts of the quadratic equation?