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vulloa22

  • 3 years ago

Find all solutions of the equation. x^4 − 6x^2 + 5 = 0

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  1. anonymous
    • 3 years ago
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    \[(x^2-5)(x^2-1)=0\] is a start

  2. ParthKohli
    • 3 years ago
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    And almost the finish.

  3. UsukiDoll
    • 3 years ago
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    true.

  4. UsukiDoll
    • 3 years ago
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    hint: factor x^2-1

  5. UsukiDoll
    • 3 years ago
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    |dw:1359862100755:dw|

  6. UsukiDoll
    • 3 years ago
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    take each equation piece by piece...aww #(*&@*(# it only x^2-5 for piece by piece because I can see that x = 1 and -1

  7. UsukiDoll
    • 3 years ago
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    |dw:1359862148598:dw|

  8. UsukiDoll
    • 3 years ago
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    take the square root of 5

  9. UsukiDoll
    • 3 years ago
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    |dw:1359862186896:dw|

  10. UsukiDoll
    • 3 years ago
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    so the answers are x = 1, -1, and whatever the last drawing is

  11. UsukiDoll
    • 3 years ago
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    oh wait we may need to test them ... well plug the x values back into the equation. I can see that 1 and -1 doesn't equal to 0

  12. UsukiDoll
    • 3 years ago
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    -3 does not equal to 0 if we plug x = 1 and -1 back into the equation

  13. UsukiDoll
    • 3 years ago
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    what wait wait wait ackkk

  14. UsukiDoll
    • 3 years ago
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    sorry I thought I saw a 4x^4 ok ok hold up

  15. UsukiDoll
    • 3 years ago
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    so... retrying this if x = -1 and 1|dw:1359862389372:dw|

  16. UsukiDoll
    • 3 years ago
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    there it does equal sorry made a mistake bad eyes

  17. UsukiDoll
    • 3 years ago
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    solutions are -1 1 -squareroot(5) squareroot(5)

  18. UsukiDoll
    • 3 years ago
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    really 7 people watching and only 1 doing? lol ?

  19. UsukiDoll
    • 3 years ago
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    5 viewing and only me doing the problem...nice -__-

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