anonymous
  • anonymous
(x+y)^2 - (9xy- 6x^2)
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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Jhannybean
  • Jhannybean
you want to expand (x+y)^2 first. what do you get when you expand it?
Jhannybean
  • Jhannybean
you can use the form \[a^2+2ab+b^2 \] to expand it.
anonymous
  • anonymous
X^2 +XY+XY+Y^2

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Jhannybean
  • Jhannybean
and what is xy + xy?
anonymous
  • anonymous
X^2Y^2
Jhannybean
  • Jhannybean
not quite... you have 2 groups of the same variables multiplied to each other (xy) +(xy) how many of these groups are there?
anonymous
  • anonymous
XY^2
Jhannybean
  • Jhannybean
we're not squaring them , theyre not mutiplied, we're adding these groups together, adding them would give you 2 groups, yes?
anonymous
  • anonymous
how?
Jhannybean
  • Jhannybean
because we have 1 GROUP if terms (xy) and another GROUP of terms (xy) together adding these we get 2xy
anonymous
  • anonymous
oh, okay. I understand now
Jhannybean
  • Jhannybean
awesome :) Now we have x^2+2xy+y^2 - (9xy - 6x^2) we simplified the left side, but in simplifying the right, what would we get once we distribute the negative?
Jhannybean
  • Jhannybean
distribute the negative to both (9xy) and (-6x^2)

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