anonymous
  • anonymous
How to factor 2x^2 - 1
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
its already factored .-.
anonymous
  • anonymous
Ok so 2x^2 - 1 has solutions 2x^2 = 1 2x^2 = 1/2 sqr(x^2) = sqr(1/2) ok I am stuck here to finding the solutions
pooja195
  • pooja195
Thats not right .-. if you were to sqrt the 2 and then you'd be left with \[(\sqrt{2}+1)(\sqrt{2}-1)\] diffrence of squares .-.

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anonymous
  • anonymous
How do I get the solutions ?
pooja195
  • pooja195
Sqrt both numbers since its the difference of 2 squares ._.
pooja195
  • pooja195
a^2-b^2=(a+b)(a-b) a=sqrt(2)x b=1
anonymous
  • anonymous
Ah ok I see now. Thank you.
pooja195
  • pooja195
\[(\sqrt{2}x+1)(\sqrt{2}x−1)\]
pooja195
  • pooja195
im sorry i meant that ^
anonymous
  • anonymous
I got it. Thank you!
pooja195
  • pooja195
:) oh and this part too a^2-b^2 =\((\sqrt2 x)^2-1^2=2x^2-1\)
pooja195
  • pooja195
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anonymous
  • anonymous
TY

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