#Completing the square

41 messages · Page 1 of 1 (latest)

fallen roost
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So I have a big exam tmrw and my teacher wants us to use completing the square method, I hate it but I'm trying.
I got the answer of x1 being = 1 + sqrt of 5 and x2 = 1 - sqrt of 5
am I right?

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bold swallowBOT
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hearty granite
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,w 2x^2-4x+8

drowsy bayBOT
hearty granite
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also it doesnt have roots

fallen roost
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uh

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idk but completing the square that's what I got

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why is it sideways

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hold on

hearty granite
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,rotate

drowsy bayBOT
hearty granite
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fear not

fallen roost
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lol

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I was about to send a new photo

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so first step was make it lc = 1

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then I moved the constant after

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shouldve done it before ik

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then I added 1/2 b^2

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and then after adding it I'm kind of lost with what to do from there but I think I did it right

hearty granite
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everything is good except you messed up the sign here

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fallen roost
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ah

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no wonder

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thanks

hearty granite
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everything else is fine tho

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youre getting it

fallen roost
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just like

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It's funny but adding and subtracting fractions confuses me

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and dividing sometimes

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something I didn't learn early on

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so the 1/2 b^2 part is what sometimes gets me off

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then the steps after

hearty granite
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you just like

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x^2+bx+c=0

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we want c to equal to (0.5b)^2

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so we just add something or subtract something

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and then we factor

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if you think about $(x+a)^{2} = x^{2}+2ax+a^{2}$ the 1/2 part might make more sense

drowsy bayBOT
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!𒐪 ɹɐupoɯ⇂ㄥ8𝟝 𒐪!

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