A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Subtract. simplify by collecting like radical term if possible
8sqrt20 6sqrt5
I got 10sqrt5 is that right????????????
anonymous
 5 years ago
Subtract. simplify by collecting like radical term if possible 8sqrt20 6sqrt5 I got 10sqrt5 is that right????????????

This Question is Closed

mathteacher1729
 5 years ago
Best ResponseYou've already chosen the best response.1\[8\sqrt{20}  6\sqrt{5}\] Let's look at the square root of 20 first. 20 = 4*5 and since 4 is a perfect square we can write: \[\sqrt{20} = \sqrt{4\cdot 5}=\sqrt{4}\cdot\sqrt{5}=2\sqrt{5}\] So instead of writing \[\sqrt{20}\] write \[2\sqrt{5}\] and now we have: \[8\sqrt{20}=8\cdot (2\sqrt{5})=16\sqrt{5}\]. And \[16\sqrt{5}6\sqrt{5} =10\sqrt{5}\] :)

mathteacher1729
 5 years ago
Best ResponseYou've already chosen the best response.1Argh, I must learn to type faster. :p

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0No your ok, thank you for your help
Ask your own question
Sign UpFind 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.