Geometry_Hater
  • Geometry_Hater
How the heck do you expand 2x - y^7?
Mathematics
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Geometry_Hater
  • Geometry_Hater
How the heck do you expand 2x - y^7?
Mathematics
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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Geometry_Hater
  • Geometry_Hater
(2x - y) ^7 i meant
anonymous
  • anonymous
Foil it out
precal
  • precal
or use pascal's triangle

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Geometry_Hater
  • Geometry_Hater
i dont know how to use pascals triangle properly
Geometry_Hater
  • Geometry_Hater
I dont know what numbers to use for it really.
precal
  • precal
have you been shown pascal's triangle, this usually happens in algebra 2 or precal
precal
  • precal
|dw:1357255357277:dw|
Geometry_Hater
  • Geometry_Hater
yes i've seen the triangle but im unsure which row of numbers im using
precal
  • precal
we need the 7th row 1 7 21 35 35 21 7 1
precal
  • precal
|dw:1357255487760:dw|lets go back to one you know (x+y)^2
precal
  • precal
|dw:1357255543811:dw|do you see the pattern?
Geometry_Hater
  • Geometry_Hater
i see
precal
  • precal
|dw:1357255613641:dw||dw:1357255598900:dw|
precal
  • precal
notice what is happening to x x^2, x^1, x^0 notice what is happenting to y y^0, y^1, y^2
precal
  • precal
we will use the same patter for your problem
Geometry_Hater
  • Geometry_Hater
so the power of x goes down while the power of y goes up?
precal
  • precal
yes
precal
  • precal
|dw:1357255801781:dw|
precal
  • precal
|dw:1357255969026:dw|
precal
  • precal
|dw:1357256006811:dw|ok just simplify it now

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