algebra

a4-26a2+169

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asked by maps
  1. If you mean a^4 - 26a^2 + 169
    then it looks like you have a perfect square.
    The fact that the first and last terms were perfect squares gave me that clue.

    Give it a try, it is quite simple

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    posted by Reiny
  2. sqrt a^4 = a^2.
    Sqrt 169 = 13.
    solution: (a^2 - 13)^2.

    check:
    (a^2 - 13)^2 = a^4 - 26a^2 + 169.

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    posted by henry2,

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