A quadratic equation is written in four equivalent forms below.

I. y = (x + 3)2 - 25
II. y = x2 + 6x - 16
III. y = (x + 8)(x - 2)
IV. y = x(x + 8) - 2(x + 8)

Which of the forms shown above would be the most useful if attempting to find the y-intercept of the quadratic equation?

Question

A quadratic equation is written in four equivalent forms below.


I. y = (x + 3)2 - 25 
II. y = x2 + 6x - 16 
III. y = (x + 8)(x - 2) 
IV. y = x(x + 8) - 2(x + 8) 

Which of the forms shown above would be the most useful if attempting to find the y-intercept of the quadratic equation?

anonymous · Answer

@shamil98 Can you double-check I just have to be sure.

anonymous · Answer

@Ryan2416 however im not denying your idea thank you

shamil98 · Answer

Okay, which option do you think it is?

anonymous · Answer

3.

shamil98 · Answer

No, option 2.
You have your quadratic factored, all you need to do to get a y - intercept is substitute values for x and combine the terms.