e.cociuba
  • e.cociuba
Expand each expression: a.) (x - 1/2)^2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
(x^2)/(4) - (x)/(2) + (1)/(4)
anonymous
  • anonymous
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
e.cociuba
  • e.cociuba
Ok so this is where I'm at: (x - 1/2) (x - 1/2) x^2- 1/2x-12x-2.25

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anonymous
  • anonymous
Assuming 12 is a typo, everything but the -2.25 looks fine. Where did you get that?
e.cociuba
  • e.cociuba
Ops ya it was a typo. Get wat from?
anonymous
  • anonymous
The -2.25 at the end. How did you get that?
e.cociuba
  • e.cociuba
well -1.5 * -1.5= 2.25 Oh so its: x^2- 1/2x-1/2x+ 2.25 Yah?
anonymous
  • anonymous
It's -1/2, not -1.5, right? -1/2*-1/2 = 1/4
e.cociuba
  • e.cociuba
well -1/2 is -1.5... in decimal form..
anonymous
  • anonymous
No, it's -0.5.
e.cociuba
  • e.cociuba
Ohh I mean -.5 srry
anonymous
  • anonymous
the square of the first + 2(first x the second with their signs ) + the square of the the last
e.cociuba
  • e.cociuba
Ok I just confused myself. Let me start over.
anonymous
  • anonymous
Alright, good plan.
e.cociuba
  • e.cociuba
(x - 1/2) (x - 1/2) x^2 - 1/2x - 1/2x + .25 (or 1/4)
anonymous
  • anonymous
Right! Just combine like terms now.
e.cociuba
  • e.cociuba
K so I got: x^2 - 1 + .25
anonymous
  • anonymous
x^2-1x+.25, you mean, right?
e.cociuba
  • e.cociuba
Oh ops I forgot to put the x in haha I'm seriously loosing my head :P
anonymous
  • anonymous
It's ok, happens to everyone :P
e.cociuba
  • e.cociuba
Haha I guess it does. K thanks for the help! :)

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