Simplify a (a^2+ a + 1) + 5 and find its value for a = 1 - Vidyadip

Question

Simplify $a (a^2+ a + 1) + 5$ and find its value for $a = 1$

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Answer

$a(a^2+ a + 1) + 5$
$= a^3+ a^2+ a + 5$
Substituting $a = 1$ in the expression
$a^3+ a^2+ a + 5$
$= 1^3+ 1^2+ 1 + 5$
$= 8$

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