A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 one year ago
Solve. 5x2 – 20 = 0
x = 5 and x = 4
x = 4 and x = 2
x = –5 and x = 20
x = 2 and x = –2
 one year ago
Solve. 5x2 – 20 = 0 x = 5 and x = 4 x = 4 and x = 2 x = –5 and x = 20 x = 2 and x = –2

This Question is Closed

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0You can start by: Dividing both the sides by 5..

RadEn
 one year ago
Best ResponseYou've already chosen the best response.0factorize by using the difference squares formula a^2  b^2 = (a+b)(ab)

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0And you can use here : \[x^2  a^2 = (x + a) (x  a)\]

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0Or if you don't wanna do this, then add 4 both the sides and then take square root both the sides.

miah
 one year ago
Best ResponseYou've already chosen the best response.0so,... whats the answer ?

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0Who told you that answer is B?

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0\(x^2  4 = 0\) Add 4 both the sides and tell me what did you get?

RadEn
 one year ago
Best ResponseYou've already chosen the best response.0well, look at how the factorization works x^2  4 = 0 x^2  2^2 = 0 use the diff square formula, (x+2)(x2) = 0 solve for x find the zeroes by make each factor be zero first, x+2=0 subtract by 2 from both sides, x+22 = 02 x = 2 do for the rest!

miah
 one year ago
Best ResponseYou've already chosen the best response.0I dont really have to do the rest because there isnt another 2 in the other choices.

waterineyes
 one year ago
Best ResponseYou've already chosen the best response.0do for the rest is actually for your own knowledge and not for answer choices you are given with..

RadEn
 one year ago
Best ResponseYou've already chosen the best response.0ok, show to us how to solve of x  2 = 0 ?
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.