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anonymous

  • one year ago

How to factor 2x^2 - 1

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  1. pooja195
    • one year ago
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    its already factored .-.

  2. anonymous
    • one year ago
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    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

  3. pooja195
    • one year ago
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    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 .-.

  4. anonymous
    • one year ago
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    How do I get the solutions ?

  5. pooja195
    • one year ago
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    Sqrt both numbers since its the difference of 2 squares ._.

  6. pooja195
    • one year ago
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    a^2-b^2=(a+b)(a-b) a=sqrt(2)x b=1

  7. anonymous
    • one year ago
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    Ah ok I see now. Thank you.

  8. pooja195
    • one year ago
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    \[(\sqrt{2}x+1)(\sqrt{2}x−1)\]

  9. pooja195
    • one year ago
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    im sorry i meant that ^

  10. anonymous
    • one year ago
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    I got it. Thank you!

  11. pooja195
    • one year ago
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    :) oh and this part too a^2-b^2 =\((\sqrt2 x)^2-1^2=2x^2-1\)

  12. pooja195
    • one year ago
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  13. anonymous
    • one year ago
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    TY

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