anonymous
  • anonymous
Solve the system by the addition method. x2 - 3y2 = 1 3x2 + 3y2 = 15 Answer choices: A. {( 1, 2), ( -1, 2), ( 1, -2), ( -1, -2)} B. {( 1, 2), ( -1, -2)} C. {( 2, 1), ( -2, 1), ( 2, -1), ( -2, -1)} D. {( 2, 1), ( -2, -1)}
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
My guess is D but i'm not 100%
anonymous
  • anonymous
or maybe c
anonymous
  • anonymous
You need to add the two equations together and then simplify the answer.

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More answers

anonymous
  • anonymous
Give me one minute and I will show you.
anonymous
  • anonymous
|dw:1377628953596:dw|
anonymous
  • anonymous
Can you simplify that now?
anonymous
  • anonymous
x=2
anonymous
  • anonymous
yes, now insert 2 for x to solve for y
Luigi0210
  • Luigi0210
Ah, watch it there, when taking the square root you get a + AND -
anonymous
  • anonymous
right and i got 1 or -1.
anonymous
  • anonymous
what do you mean @Luigi0210
Luigi0210
  • Luigi0210
Meaning that in this example you would plug in two values
Luigi0210
  • Luigi0210
A +2 and -2
anonymous
  • anonymous
That is true @Luigi0210 thanks, I forgot that
anonymous
  • anonymous
thats what i was wondering @Luigi0210 and what i was trying to find out. so would it be C then?
Luigi0210
  • Luigi0210
Sorry @mikoski2 I am not allowed to give out answers >.< but @OffnenStudieren can walk you through it :)
anonymous
  • anonymous
Well, what values have you gotten for x, and what for y?
anonymous
  • anonymous
x=2 y=1 or -1 what i guess i am trying to find out is if -2 is also a possiblity. and trying to make sure that what i think the answer is is right, and i think it is c
anonymous
  • anonymous
yes, I agree
anonymous
  • anonymous
Just make sure you completely understand this by finding another example problem and doing it. That is always a good idea for problems like these.
Luigi0210
  • Luigi0210
Yup! Btw, you guys know you can give out medals right?
anonymous
  • anonymous
thank you i do understand even better now @OffnenStudieren
Luigi0210
  • Luigi0210
If you guys have any questions feel free to PM me anytime, or anybody else with an A next to their name :)
Luigi0210
  • Luigi0210
Questions on the site that is, not homework questions xD

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