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LollyLau

  • 5 years ago

Can I factor a^2 + 4?

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  1. anonymous
    • 5 years ago
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    No, in general sense.

  2. anonymous
    • 5 years ago
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    With imaginary numbers: (a - 2i)(a + 2i)

  3. LollyLau
    • 5 years ago
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    Can we avoid using imaginary numbers?

  4. slaaibak
    • 5 years ago
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    nope

  5. LollyLau
    • 5 years ago
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    -.-"

  6. anonymous
    • 5 years ago
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    a^2 + 4 = (a + 2)^2 - 4a Does this help?

  7. LollyLau
    • 5 years ago
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    I know that :)

  8. anonymous
    • 5 years ago
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    There is another formula involving trig, but I don't remember that now.

  9. LollyLau
    • 5 years ago
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    ???

  10. anonymous
    • 5 years ago
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    If its a^2 - 4, then, a^2 - 4 = (a + 2)(a - 2). But I assume that you've made no mistake in copying the question?

  11. LollyLau
    • 5 years ago
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    nope

  12. anonymous
    • 5 years ago
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    OK, so that's wrong......

  13. anonymous
    • 5 years ago
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    I think you just can't factor it......

  14. LollyLau
    • 5 years ago
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    hopeless...

  15. anonymous
    • 5 years ago
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    u can do it using imaginary roots

  16. anonymous
    • 5 years ago
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    why are you factoring it ;D

  17. anonymous
    • 5 years ago
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    Because that's the question?

  18. radar
    • 5 years ago
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    I can't factor it.........but maybe someone else can.

  19. jagatuba
    • 5 years ago
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    No it cannot be factored without the use of imaginary numbers.

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