anonymous
  • anonymous
Factor the four-term polynomial. mn - 15 + 3m - 5n (m + 3)(n - 5) (n - 3)(m - 5) (n + 3)(m - 5)
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
I think it is the 1st one
anonymous
  • anonymous
Nope
anonymous
  • anonymous
okay how do u do it

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whpalmer4
  • whpalmer4
You should multiply out each of those expressions...you need the practice!
whpalmer4
  • whpalmer4
The 1st one: \[(m+3)(n-5) = mn -5m + 3n - 15\]
anonymous
  • anonymous
wat
anonymous
  • anonymous
Let (m+x) (n+y) = mn - 15 + 3m - 5n => mn+ym+xn+xy=mn-15+3m-5n
anonymous
  • anonymous
U need to find x and y from there
whpalmer4
  • whpalmer4
\[(a+b)(c+d) = a(c+d) + b(c+d) = ac + ad + bc + bd\] If you want to be clever, note that to get a +3m, you need to have a +3 multiply an m, and there's only one such equation.
anonymous
  • anonymous
comparing coffecients gives: x=-5 and y=3
anonymous
  • anonymous
so, (m+x) (n+y) = mn - 15 + 3m - 5n = (m-5)(n+3)
anonymous
  • anonymous
got it
anonymous
  • anonymous
so its the last one
anonymous
  • anonymous
yep
anonymous
  • anonymous
okay lol help me again please

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