anonymous
  • anonymous
Expand (x - 2y)4. A: x4 + 8x3y + 24x2y2 + 32xy3 + 16y4 B: x4 - 8x3y + 24x2y2 - 32xy3 + 16y4 C: x4 - 8x3y + 24x2y2 - 34xy3 + 16y4 D: x4 - 8x3y + 28x2y2 - 32xy3 + 16y4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
aren't they all the same?
anonymous
  • anonymous
not really.
anonymous
  • anonymous
i think its x^4 - 8x^3y + 24x^2y^2 - 32xy^3 + 16y^4 (B)

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amistre64
  • amistre64
they only differ in sign changes
anonymous
  • anonymous
@amistre64 actually that and the coefficients.
amistre64
  • amistre64
...28 and 34 .... sneaky
anonymous
  • anonymous
the numbers are different too. the numbers, signs and all that. they're not the same. none of them.
amistre64
  • amistre64
1 4 6 4 1 pascal row x x x x 1 power down 1 -2y -2y -2y -2y power up -------------------
anonymous
  • anonymous
x^4 - 8x^3y + 24x^2y^2 - 32xy^3 + 16y^4??
amistre64
  • amistre64
http://www.wolframalpha.com/input/?i=expand+%28x+-+2y%29%5E4 but yeah, B is good

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