Simplify a (a^2 + a + 1) + 5 and find it...

Simplify `a (a^2 + a + 1) + 5` and find its value for : a = – 1.

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MBD-ALGEBRAIC EXPRESSIONS AND IDENTITIES-EXERCISE

Simplify a (a^2 + a + 1) + 5 and find its value for : a = – 1.
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