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Properties of Square Numbers

x3+7x2+x=?If ...

Question

$x^{3} + 7 x^{2} + x =$ ?
If $x = 7$

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Solution

For $x = 7$ ,
$x^{3} + 7 x^{2} + x$
$= 7^{3} + 7^{3} + 7$
$= 2.343 + 7$
$= 693$ .

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