anonymous
  • anonymous
15n^2-n-28 factored with work
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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amistre64
  • amistre64
n- /15 ; n+ /15 15(28) = 240+320+50 = 700
amistre64
  • amistre64
1,700; 2,350; 4,125; 5,120, 10; 60, 20; 30 will work
amistre64
  • amistre64
30 and 20 will not work; thats 10 not 1 lol n- 30/15 ; n+ 20/15 n- 2 ; n+ 4/3 n- 2 ; 3n+ 4

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amistre64
  • amistre64
14,50; 28,25..soo close
amistre64
  • amistre64
n(n+1) = 700 n^2 +n -700 n= -1/5 +- sqrt(2801)/2
anonymous
  • anonymous
so then what is it when factored out
amistre64
  • amistre64
trying to ge to that, doesnt seem to work...did you miss a number like 3 perhaps?
amistre64
  • amistre64
that middle terms looks to be missing a number to it
anonymous
  • anonymous
no thats exactly how it is on my worksheet
amistre64
  • amistre64
420...it helps if i know how to multiply lol..... back on track lol
amistre64
  • amistre64
10,42; 20, 21 thats it lol
amistre64
  • amistre64
n- 21/15 ; n+ 20/15 n- 7/5 ; n+ 4/3 5n- 7 ; 3n+ 4
amistre64
  • amistre64
my georgia math got befuddled ;)
anonymous
  • anonymous
lol that happens to me alot i was thinking for a second i would get some bonus points for bringing a mistake to the teachers attention lol
amistre64
  • amistre64
15 28 ---- 240 160 50 ---- 450 ....im 30 off, why?
anonymous
  • anonymous
hmm im not to sure why
dumbcow
  • dumbcow
20*15 = 300 8*10=80 8*5=40 sum =420

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