Question
Find following products:
$\left(x^2+7\right)\left(x^2+7\right)$

Answer

$\left(x^2+7\right)\left(x^2+7\right)$
$=\left(x^2+7\right)^2$
$=\left(x^2\right)^2+7^2+2 \times x^2 \times 7$
$=x^4+49+14 x^2$

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