Question

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

Answer 1

hmmm....w8...

Answer 2

c=2
(r-2)^2=r^2-2*r*2+2^2)=r^2-4r+4 :)
i guess :):):)

Answer 3

(r+a)^2 = r^2 + 2ar +a^2
for this problem
2a = -4
a^2 = c

2a = -4
a = -2

c = (-2)^2 = 4

Answer 4

oops yea c=2^2=4 :) sorry :)

Answer 5

wait what does ^ stand for???

Answer 6

@dumbcow u explain that please idk the word in english(english it's not my birth language) tht's y :)

Answer 7

4 example 2^2=4
3^2=9 like squared or not...depends

Answer 8

its for exponents

Answer 9

exactly!!! :)i just learnt a new word :) ^_^

Answer 10

ohh got it got it, thanks guyys [: are you both students?
high school ?

Answer 11

yea 12th grade :S :S

Answer 12

im a student but way past high school, haha

Answer 13

Haha I see. I am an upcoming junior .

Answer 14

:)

Answer 15

nice, yeah this is a pretty good place to get help with hw and math questions
lot of good math people here

Answer 16

Yeah I can see that, I really like this website .