r(squared)-4r+c find the value of c that completes the square. how do you do this? :/

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r(squared)-4r+c find the value of c that completes the square. how do you do this? :/

Mathematics
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hmmm....w8...
c=2 (r-2)^2=r^2-2*r*2+2^2)=r^2-4r+4 :) i guess :):):)
(r+a)^2 = r^2 + 2ar +a^2 for this problem 2a = -4 a^2 = c 2a = -4 a = -2 c = (-2)^2 = 4

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oops yea c=2^2=4 :) sorry :)
wait what does ^ stand for???
@dumbcow u explain that please idk the word in english(english it's not my birth language) tht's y :)
4 example 2^2=4 3^2=9 like squared or not...depends
its for exponents
exactly!!! :)i just learnt a new word :) ^_^
ohh got it got it, thanks guyys [: are you both students? high school ?
yea 12th grade :S :S
im a student but way past high school, haha
Haha I see. I am an upcoming junior .
:)
nice, yeah this is a pretty good place to get help with hw and math questions lot of good math people here
Yeah I can see that, I really like this website .

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