Question
Write down the following product:
$\left(x^2+1\right)\left(x^2+2\right)$
$\left(x^2+1\right)\left(x^2+2\right)$
✓
Answer
$x^4+3 x^2+2$
[Hint. Put $x^2=y$ ]
[Hint. Put $x^2=y$ ]
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