A quadratic equation is written in four equivalent forms below. I. y = (x + 5)2 - 1
II. y = x2 + 10x + 24
III. y = (x + 4)(x + 6)
IV. y = x(x + 10) + 24

Which of the forms shown above would be the most useful if attempting to find the x-intercepts of the quadratic equation?
A.
II.
B.
I.
C.
IV.
D.
III.