Q. 4 B3.9( 115 Votes )

# Simplify and find its value for

(i)

(ii)

(iii)

Answer :

(i)

Substituting a = 0 in the expression

a(a^{2} + a + 1) + 5 = 0(0^{2} + 0 + 1) + 5

a(a^{2} + a + 1) + 5 = 0 + 5

a(a^{2} + a + 1) + 5 = 5

(ii)

Substituting a = 1 in the expression(iii) Substituting a = -1 in the expression

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