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

ihatealgebrasomuch Group Title

i have to solve this by factoring... 49=9x^2 ... can i put a sqr. root sign over both sides, get 7=9x, and then get x=7/9???

  • 2 years ago
  • 2 years ago

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

    Well, that's not actually factoring, and you lose the answer x=-7/9

    • 2 years ago
  2. sami-21 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    since it says solve by factoring i would say do nt take square root write as 9x^2-49=0 or can be written as \[\Large \implies (3x)^2-(7)^2=0\] now use the formula \[\Large a^2-b^2=(a+b)(a-b)\] in the above we have a=3x ,b=7 just put that in the given formula does this help you ?

    • 2 years ago
  3. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yes you can square both sides 49=9x^2 \[\sqrt{49}=\sqrt{9x ^2{}}\] 7=3x divide by 3 so x=3/7 but its plus or minus

    • 2 years ago
  4. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    however is does say fator 49=9x^2 bring 49 to other side of equal sgn 9x^2-49=0 (3x-7)(3x+7)=0 solve for x 3x-7=0 3x=7 divide by 3 x=7/3 and 3x+7=0 3x=-7 x=-7/3

    • 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.