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

indianwaking97 Group Title

What is the solution of X^2+64=0? -5 8 +-8 no solution

  • one year ago
  • one year ago

  • This Question is Closed
  1. mikelo40 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Simplifying x2 + -64 = 0 Reorder the terms: -64 + x2 = 0 Solving -64 + x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '64' to each side of the equation. -64 + 64 + x2 = 0 + 64 Combine like terms: -64 + 64 = 0 0 + x2 = 0 + 64 x2 = 0 + 64 Combine like terms: 0 + 64 = 64 x2 = 64 Simplifying x2 = 64 Take the square root of each side: x = {-8, 8}

    • one year ago
  2. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    x=8

    • one year ago
  3. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    x=-8 too it's both

    • one year ago
  4. mikelo40 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ^ :D

    • one year ago
  5. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    lol

    • one year ago
  6. indianwaking97 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks:)

    • one year ago
  7. mikelo40 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Np.

    • one year ago
  8. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    np :D

    • one year ago
  9. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    haha

    • one year ago
  10. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    \[x^2+64=0 \] has only solutions in \[ \mathbb{C}\] though

    • one year ago
  11. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    no because you subtract 64 then it's x^2 = 64 and then you square root it all :) which is x=8 or x=-8 :D

    • one year ago
  12. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ur finding x not b or c

    • one year ago
  13. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yes, can you take the square root from a negative number?

    • one year ago
  14. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Take a look at this: http://www.wolframalpha.com/input/?i=x%5E2%2B64%3D0

    • one year ago
  15. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i just know the answer i'm not really good at other things :/ sorry

    • one year ago
  16. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Anyway, in Reals this one has no answer, so -> no solution

    • one year ago
  17. brookester6 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    ummm idk O.o i think it's x= -8;8

    • one year ago
  18. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Just check then, if x=8 is your solution, plug it into your equation and tell me if that gives you zero. \[x^2+64=0\] so you say x=8 \[(8)^2+64=64+64=128 \neq 0 \]

    • one year ago
  19. Spacelimbus Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Now check for your other solution, you say x=-8 is a solution, so you plug that one in too: \[(-8)^2+64=64+64=128\neq0\]

    • one year 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.