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anonymous

  • 5 years ago

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

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  1. angela210793
    • 5 years ago
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    hmmm....w8...

  2. angela210793
    • 5 years ago
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    c=2 (r-2)^2=r^2-2*r*2+2^2)=r^2-4r+4 :) i guess :):):)

  3. dumbcow
    • 5 years ago
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    (r+a)^2 = r^2 + 2ar +a^2 for this problem 2a = -4 a^2 = c 2a = -4 a = -2 c = (-2)^2 = 4

  4. angela210793
    • 5 years ago
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    oops yea c=2^2=4 :) sorry :)

  5. anonymous
    • 5 years ago
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    wait what does ^ stand for???

  6. angela210793
    • 5 years ago
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    @dumbcow u explain that please idk the word in english(english it's not my birth language) tht's y :)

  7. angela210793
    • 5 years ago
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    4 example 2^2=4 3^2=9 like squared or not...depends

  8. dumbcow
    • 5 years ago
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    its for exponents

  9. angela210793
    • 5 years ago
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    exactly!!! :)i just learnt a new word :) ^_^

  10. anonymous
    • 5 years ago
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    ohh got it got it, thanks guyys [: are you both students? high school ?

  11. angela210793
    • 5 years ago
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    yea 12th grade :S :S

  12. dumbcow
    • 5 years ago
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    im a student but way past high school, haha

  13. anonymous
    • 5 years ago
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    Haha I see. I am an upcoming junior .

  14. angela210793
    • 5 years ago
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    :)

  15. dumbcow
    • 5 years ago
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    nice, yeah this is a pretty good place to get help with hw and math questions lot of good math people here

  16. anonymous
    • 5 years ago
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    Yeah I can see that, I really like this website .

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