a quadratic equation is written in four equivalent forms below

Question

I. y=x(x-4)-32
II. y=(x-2)^2-36
III. y=x^2-4x-32
IV. y=(x+4)(x-8)
which of the forms shown above would be the most useful if attempting to find the x intercepts of the quadratic equation?

a. IV
b. II
c.III
d. I

Answer 1

To find the x-intercepts of a quadratic equation, it is helpful to have the equation in factored form. Form IV, y = (x+4)(x-8), is already in factored form, making it the most useful form for finding the x-intercepts of the quadratic equation.

Therefore, the correct answer is:

a. IV