anonymous
  • anonymous
quick algebra question?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
the area of a square is 5 more than its perimeter. find the length of a side.
anonymous
  • anonymous
my work so far: 4r=r^2+5 r^2-4r+5=0 then I am supposed to factor? I cannot figure out how to factor this! I literally tried every possible way.. :( someone please help me?
anonymous
  • anonymous
Good morning I think I mIght be able to assist

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anonymous
  • anonymous
I bRelieve your doing it correctly so far
anonymous
  • anonymous
awesome thanks!
anonymous
  • anonymous
Hey that's what I'm here for
anonymous
  • anonymous
Brb
anonymous
  • anonymous
Ok I'm back Olivia
anonymous
  • anonymous
And thX for the compliment I appreciate it
anonymous
  • anonymous
ok im here! :)
amistre64
  • amistre64
Are we reading it correctly? Area = Perimeter + 5 how do we define area and perimeter of a square ?
anonymous
  • anonymous
yes I believe so.. And im not sure, I honestly just follow the practice problems along with the actual problem to solve it. :/
amistre64
  • amistre64
area, is 5 more than perimeter area = perimeter + 5 area = r^2, and perimeter is 4r youre initial setup seems flawed to me
anonymous
  • anonymous
ok, like i said I was just following the practice problem so the way I set it up is probably wrong. how would you set it up?
amistre64
  • amistre64
the way i have already set it up ... area = perimeter + 5
anonymous
  • anonymous
ok but how would i solve that? thanks for ur help btw!
amistre64
  • amistre64
the area of a square is 5 more than its perimeter ^^^ = ^ ^^^ ^^^^^^^ r^2 = 4r + 5 area = perimeter + 5 ------------------ but you setup as: 4r = r^2 + 5 perimeter = area + 5 ------------------- solving it is just finding the solutions to the quadratic, factor if you can (it most likely factorable)
amistre64
  • amistre64
r^2 -4r -5 = 0
anonymous
  • anonymous
ok give me a second to factor it
amistre64
  • amistre64
any thoughts about how we could factor it?
amistre64
  • amistre64
k
anonymous
  • anonymous
(r+1)(r-5)=0
amistre64
  • amistre64
you did fine with the factoring
anonymous
  • anonymous
ok, so it would solve to be r=-1, and r=5...so it would be 5 units?
amistre64
  • amistre64
5 is the workable length, -1 is just a extra value that doesnt fit with the expected domain and can be ignored 5 is fine
anonymous
  • anonymous
yay is what right! thanks so much for your help it was a lot easier than i thought :p
amistre64
  • amistre64
ive had years of practice :) youll do fine

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