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



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onegirl
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(x^2)/(4)  (x)/(2) + (1)/(4)

srossd
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First, right it as two binomials: (x1/2)(x1/2)
Then, use FOIL:
Firsts: x^2
Outers: 1/2x
Inners: 1/2x
Lasts: 1/4
So you get x^2x+1/4

e.cociuba
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Ok so this is where I'm at:
(x  1/2) (x  1/2)
x^2 1/2x12x2.25

srossd
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Assuming 12 is a typo, everything but the 2.25 looks fine. Where did you get that?

e.cociuba
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Ops ya it was a typo. Get wat from?

srossd
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The 2.25 at the end. How did you get that?

e.cociuba
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well 1.5 * 1.5= 2.25
Oh so its:
x^2 1/2x1/2x+ 2.25
Yah?

srossd
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It's 1/2, not 1.5, right? 1/2*1/2 = 1/4

e.cociuba
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well 1/2 is 1.5... in decimal form..

srossd
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No, it's 0.5.

e.cociuba
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Ohh I mean .5 srry

RED123url
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the square of the first + 2(first x the second with their signs ) + the square of the the last

e.cociuba
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Ok I just confused myself. Let me start over.

srossd
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Alright, good plan.

e.cociuba
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(x  1/2) (x  1/2)
x^2  1/2x  1/2x + .25 (or 1/4)

srossd
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Right! Just combine like terms now.

e.cociuba
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K so I got:
x^2  1 + .25

srossd
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x^21x+.25, you mean, right?

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

srossd
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It's ok, happens to everyone :P

e.cociuba
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Haha I guess it does. K thanks for the help! :)