anonymous
  • anonymous
by foil method: (2m-5n) (3n-7n)
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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Mimi_x3
  • Mimi_x3
6mn - 14mn - 15n^2 + 35n^2 6mn - 14mn +20n^2
anonymous
  • anonymous
i need other answer pls
Mimi_x3
  • Mimi_x3
other answer ?

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anonymous
  • anonymous
yes
Mimi_x3
  • Mimi_x3
but there's only one answer to this question
anonymous
  • anonymous
by horizontal method: (2m-5n) (3m-7n)
Mimi_x3
  • Mimi_x3
oh horizontal method!? I dont know what a horizontal method sorry
anonymous
  • anonymous
http://www.purplemath.com/modules/polymult.htm
Mimi_x3
  • Mimi_x3
is horizontal method like foil method ?
anonymous
  • anonymous
(sm-5n)(3m-7n) =(2m-5n)3m - (2m-5n)7n and so on ...
anonymous
  • anonymous
is this a answer
Mimi_x3
  • Mimi_x3
oh but you would get the same answer anyway
anonymous
  • anonymous
you would, if you didn't mess up :) (2m-5n)(2m-7n) =(2m-5n)3m - (2m-5n)7n =6m^2-15mn - 14mn+35n^2 =6m^2 -29mn +35n^2
anonymous
  • anonymous
which I do a lot ...
Mimi_x3
  • Mimi_x3
looks complicated , the foil method is better xD
anonymous
  • anonymous
I like box method best !!
Mimi_x3
  • Mimi_x3
what's box method ?
anonymous
  • anonymous
|dw:1316601780696:dw|
anonymous
  • anonymous
|dw:1316601826720:dw|
Mimi_x3
  • Mimi_x3
wow~ looks more complicated though, first time seeing that method xD
anonymous
  • anonymous
|dw:1316601875640:dw|
anonymous
  • anonymous
it's cool, especially when you multiply stuff like: (2m-5n+8k)(4m+6) How would you do that with FOIL ? :)
Mimi_x3
  • Mimi_x3
yeah true but you can still do that with FOIL, and the box one looks complicated
anonymous
  • anonymous
it looks that way, until you do a couple of them :)
anonymous
  • anonymous
but it's really all the same
Mimi_x3
  • Mimi_x3
Yeah might try it some day xD

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