anonymous
  • anonymous
Find the zeros of the function x^2 - x-4
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
shadowfiend
  • shadowfiend
Do you know how to factor this equation?
anonymous
  • anonymous
Yes but my problem is, is that I can't think of anything that added toger is 1 and multi to get 4
shadowfiend
  • shadowfiend
Hm. Fair enough. So there are a couple of ways to approach this. Do you know the quadratic formula?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
yes -2 +- \[-b +_\sqrt{b^2 - 4ac} \over 2a\]
shadowfiend
  • shadowfiend
Right. Do you know what a, b, and c are in your equation?
anonymous
  • anonymous
yes a is 1x^2 b is 1x and c is 4
shadowfiend
  • shadowfiend
Close, a, b, and c are the coefficients -- so a is 1, b is -1, and c is -4. Remember that a minus sign is part of the coefficient :) Can you plug those in?
anonymous
  • anonymous
yeah I get \[1 \pm \sqrt{15} \over 2\]
shadowfiend
  • shadowfiend
Right-o. And there are your two zeros.
anonymous
  • anonymous
what are the two zeros?
shadowfiend
  • shadowfiend
The quadratic equation describes two results: \[x = \frac{1 + \sqrt{15}}{2}\] and \[x = \frac{1 - \sqrt{15}}{2}\] Those are the two zeros of the equation.
anonymous
  • anonymous
oh, ok thanks alot
shadowfiend
  • shadowfiend
No problem, glad to help :)
anonymous
  • anonymous
wouldn't this be 17 instead of 15?

Looking for something else?

Not the answer you are looking for? Search for more explanations.