Respuesta :

Answer:

[tex]a ^{2} [/tex]

a^4 + a^2 + 1

a^4 + a^2 + x + 1

a^2 ( a^2 + 1) + 1 ( x + 1)

so, here clearly we can see that If wee add a^2 in place of x it would be a perfect square..

Hope it helpz~

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