# 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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