Simplify a (a^2+ a + 1) + 5 and find its value for a = 0 - Vidyadip

Question

Simplify $a (a^2+ a + 1) + 5$ and find its value for $a = 0$

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Answer

We have $a(a^2+ a + 1) + 5 = a^3+ a^2+ a + 5$
Now substituting $a = 0$ in the expression
$a^3+ a^2+ a + 5 = 0^3+ 0^2+ 0 + 5$
$= 0 + 0 + 0 + 5 = 5$

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