• Support PF! Buy your school textbooks, materials and every day products Here!

Distributing a Negative Sign

  • Thread starter Drakkith
  • Start date
  • #1
Drakkith
Staff Emeritus
Science Advisor
20,797
4,533

Homework Statement



[itex]\sqrt{-3y-8}[/itex] = [itex]-\sqrt{y+4}+2[/itex]

I need to square both sides in order to solve for Y.
But, how do I distribute the negative sign on the right side? Would it be similar to (-x+2)2 or -(x+2)2?
 
Last edited:

Answers and Replies

  • #2
vela
Staff Emeritus
Science Advisor
Homework Helper
Education Advisor
14,617
1,252
If it's less confusing for you, you could write the righthand side as ##2-\sqrt{y+4}##.
 
  • Like
Likes 1 person
  • #3
Drakkith
Staff Emeritus
Science Advisor
20,797
4,533
If it's less confusing for you, you could write the righthand side as ##2-\sqrt{y+4}##.
Oh, well that makes perfect sense now. Thanks!
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
41,833
955
To answer the question asked, squaring [itex]-\sqrt{y+ 4}+ 2[/itex] is [itex](-\sqrt{y+ 4}+ 2)^2= y+ 4- 4\sqrt{y+ 4}+ 4[/itex].
 

Related Threads on Distributing a Negative Sign

  • Last Post
Replies
5
Views
2K
Replies
1
Views
1K
Replies
8
Views
800
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
5
Views
6K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
5K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
1
Views
906
Top