Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Alexandra-morales24 Group Title

Given the following perfect square trinomial, fill in the missing term. (Do not type the variable in the blank.) 4x2 + ___x + 49

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. cwrw238 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    the two square roots involved are 2 and 7 so arithmetic on these will give you the missing number

    • 2 years ago
  2. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    well, our options for this would suggest that: (2x)^2 + nx + (7)^2 comes form either: (2x+7)^2 or (2x-7)^2 ; the + on the middle term would indicate the first

    • 2 years ago
  3. Savvy Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    since 49 is apart of the square a term must be its square root i.e. 7 and sincce the other square term is 4x^2...then the term before squaring must be its square root i.e. 2x... so (2x + 7)^2 = 4x^2 + 28x + 49

    • 2 years ago
  4. ZhangYan Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    The answer would be 4x^2+ 14x+49 You take the square root of 49 and then take that answer (which is 7) and multiply it by 2. Hope this helps!

    • 2 years ago
  5. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Zhang, that only works if the first term is an x^2; we got a 4 in the way this time to do that we would have to divide off the 4 and work it out

    • 2 years ago
  6. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    but, i spose the wrong answer is the best answer :) lol

    • 2 years ago
  7. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    yes, it is

    • 2 years ago
  8. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    (2x+7)^2 = 4x^2 +28x + 49

    • 2 years ago
  9. ZhangYan Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    @amistre64 is my answer is wrong??

    • 2 years ago
  10. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    you should be able to dbl chk it to determine that, but as is, your answer is wrong. You did not account for the 4 on the first term

    • 2 years ago
  11. ZhangYan Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    oh right lol sorry it was 28

    • 2 years ago
  12. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    (ax+b)^2 = (ax)^2 + 2ab x + b^2 sqrt(b^2) * 2 = 2b but that only works if a=1, otherwise we have to adjust it for a

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.