anonymous
  • anonymous
I REALLY NEED HELP, IT'S AN EMERGENCY!! WILL MEDAL
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Here's a picture of the problem
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Preetha
  • Preetha
You could pay for Qualified Help.
anonymous
  • anonymous
I don't have the money

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anonymous
  • anonymous
@ganeshie8 @mathmate @paki @rishavraj @Bookworm14
just_one_last_goodbye
  • just_one_last_goodbye
Still need help @rosebud4612flvs ? ^_^
mathmate
  • mathmate
Solve by comparison, y=2x^2-1 y=-4x+1 Since both right-hand sides equal to y, you only have to equate them to get: (y=)2x^2-1=-4x+1 Transpose terms to get an expression ....=0 which matches one of the answers.
anonymous
  • anonymous
I think I'm good; When I did it by myself I got x^2+2x-1=0
mathmate
  • mathmate
You have probably missed a (-1) from the second equation.
just_one_last_goodbye
  • just_one_last_goodbye
No problem ^_^ we believe everyone deserves an education but... it would be nice if you could get some qualified helper to help :) see... the people helping can give you a wrong answer but our QH help with a 100% step by step help and we can assure you that the answer will be correct (or your money back)
anonymous
  • anonymous
I don't have money for a QH
imqwerty
  • imqwerty
don wrry :)
just_one_last_goodbye
  • just_one_last_goodbye
^ agreed ^_^
anonymous
  • anonymous
Okay, so I know it's not C or D
anonymous
  • anonymous
The one's would cancel out right?
anonymous
  • anonymous
which would leave B?
mathmate
  • mathmate
@just_one_last_goodbye Are you suggesting that non QH will give a wrong answer and QH will not?
imqwerty
  • imqwerty
\[-4x+1=y=2x^2-1\]\[-4x+1=2x^2-1\]can u find the answer now :)
anonymous
  • anonymous
?
anonymous
  • anonymous
@mathmate is B correct?
mathmate
  • mathmate
Follow what @imqwerty is working out for you. We're using the same method. @rosebud4612flvs
imqwerty
  • imqwerty
ok we know that- \[y=-4x+1\]and also that\[y=2x^2-1\] so -4x+1 and 2x^2-1 are both equal to y so they both are equal so we can write\[-4x+1=2x^2-1\]did u understand this step?@rosebud4612flvs
anonymous
  • anonymous
Yes, I understand that step. What do I do next?
anonymous
  • anonymous
Do I have to combine the x's?
just_one_last_goodbye
  • just_one_last_goodbye
@mathmate I am stating that some non QH will probably give you a direct answer. and it might be wrong. Not all tho ^_^ Forgive me if I said it wrong
anonymous
  • anonymous
Okay so would I do 2x^2-1+(-4x+1)?
anonymous
  • anonymous
ugh
anonymous
  • anonymous
I think I did that wrong
mathmate
  • mathmate
@just_one_last_goodbye whew! it's a little more clear!
imqwerty
  • imqwerty
yes :) its correct so now u have this-\[-4x+1-(-4x+1)=2x^2 - 1 -(-4x+1)\] now open the brackets
anonymous
  • anonymous
okay so the first part cancels out
anonymous
  • anonymous
and that leaves me with 2(x^2−1+2x)
anonymous
  • anonymous
is that correct?
imqwerty
  • imqwerty
yes and what about the right hand side
anonymous
  • anonymous
is it 2(x^2−1+2x)
anonymous
  • anonymous
would it be C?
anonymous
  • anonymous
x^2+2x-1=0
imqwerty
  • imqwerty
no, what did u get on opening the bracket on the right hand side?
anonymous
  • anonymous
on the right hand side I got 2(x2−1+2x)
imqwerty
  • imqwerty
yes that is correct :D so now we have- \[0=2(x^2-1+2x)\]opening the bracket u get-\[0=2(x^2)+2(-1)+2(2x)\]\[0=2x^2-2+4x\] thas ur answer :)
anonymous
  • anonymous
should it have been 2x^2-1+4x+1?
anonymous
  • anonymous
oh wait forget that
anonymous
  • anonymous
THANK YOU SO MUCH
imqwerty
  • imqwerty
have u understood how we got the answer ?
anonymous
  • anonymous
It was correct :) and I understand it so much better now thank you
imqwerty
  • imqwerty
np (:

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