Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$${ a }^{ 4 } + { a }^{ 2 } +1$$

Factor

$\left(a^{2}-a+1\right)\left(a^{2}+a+1\right)$

Evaluate

$a^{4}+a^{2}+1$

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