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Geometry_Hater

  • one year ago

How the heck do you expand 2x - y^7?

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  1. Geometry_Hater
    • one year ago
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    (2x - y) ^7 i meant

  2. Argos
    • one year ago
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    Foil it out

  3. precal
    • one year ago
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    or use pascal's triangle

  4. Geometry_Hater
    • one year ago
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    i dont know how to use pascals triangle properly

  5. Geometry_Hater
    • one year ago
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    I dont know what numbers to use for it really.

  6. precal
    • one year ago
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    have you been shown pascal's triangle, this usually happens in algebra 2 or precal

  7. precal
    • one year ago
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    |dw:1357255357277:dw|

  8. Geometry_Hater
    • one year ago
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    yes i've seen the triangle but im unsure which row of numbers im using

  9. precal
    • one year ago
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    we need the 7th row 1 7 21 35 35 21 7 1

  10. precal
    • one year ago
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    |dw:1357255487760:dw|lets go back to one you know (x+y)^2

  11. precal
    • one year ago
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    |dw:1357255543811:dw|do you see the pattern?

  12. Geometry_Hater
    • one year ago
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    i see

  13. precal
    • one year ago
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    |dw:1357255613641:dw||dw:1357255598900:dw|

  14. precal
    • one year ago
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    notice what is happening to x x^2, x^1, x^0 notice what is happenting to y y^0, y^1, y^2

  15. precal
    • one year ago
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    we will use the same patter for your problem

  16. Geometry_Hater
    • one year ago
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    so the power of x goes down while the power of y goes up?

  17. precal
    • one year ago
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    yes

  18. precal
    • one year ago
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    |dw:1357255801781:dw|

  19. precal
    • one year ago
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    |dw:1357255969026:dw|

  20. precal
    • one year ago
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    |dw:1357256006811:dw|ok just simplify it now

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spraguer (Moderator)
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