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e.cociuba

  • 2 years ago

Expand each expression: a.) (x - 1/2)^2

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  1. onegirl
    • 2 years ago
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    (x^2)/(4) - (x)/(2) + (1)/(4)

  2. srossd
    • 2 years ago
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    First, right it as two binomials: (x-1/2)(x-1/2) Then, use FOIL: Firsts: x^2 Outers: -1/2x Inners: -1/2x Lasts: 1/4 So you get x^2-x+1/4

  3. e.cociuba
    • 2 years ago
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    Ok so this is where I'm at: (x - 1/2) (x - 1/2) x^2- 1/2x-12x-2.25

  4. srossd
    • 2 years ago
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    Assuming 12 is a typo, everything but the -2.25 looks fine. Where did you get that?

  5. e.cociuba
    • 2 years ago
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    Ops ya it was a typo. Get wat from?

  6. srossd
    • 2 years ago
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    The -2.25 at the end. How did you get that?

  7. e.cociuba
    • 2 years ago
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    well -1.5 * -1.5= 2.25 Oh so its: x^2- 1/2x-1/2x+ 2.25 Yah?

  8. srossd
    • 2 years ago
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    It's -1/2, not -1.5, right? -1/2*-1/2 = 1/4

  9. e.cociuba
    • 2 years ago
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    well -1/2 is -1.5... in decimal form..

  10. srossd
    • 2 years ago
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    No, it's -0.5.

  11. e.cociuba
    • 2 years ago
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    Ohh I mean -.5 srry

  12. RED123url
    • 2 years ago
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    the square of the first + 2(first x the second with their signs ) + the square of the the last

  13. e.cociuba
    • 2 years ago
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    Ok I just confused myself. Let me start over.

  14. srossd
    • 2 years ago
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    Alright, good plan.

  15. e.cociuba
    • 2 years ago
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    (x - 1/2) (x - 1/2) x^2 - 1/2x - 1/2x + .25 (or 1/4)

  16. srossd
    • 2 years ago
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    Right! Just combine like terms now.

  17. e.cociuba
    • 2 years ago
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    K so I got: x^2 - 1 + .25

  18. srossd
    • 2 years ago
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    x^2-1x+.25, you mean, right?

  19. e.cociuba
    • 2 years ago
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    Oh ops I forgot to put the x in haha I'm seriously loosing my head :P

  20. srossd
    • 2 years ago
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    It's ok, happens to everyone :P

  21. e.cociuba
    • 2 years ago
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    Haha I guess it does. K thanks for the help! :)

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