Q. 4 B3.9( 115 Votes )

# Simplify and find its value for(i) (ii) (iii)

(i)

Substituting a = 0 in the expression

a(a2 + a + 1) + 5 = 0(02 + 0 + 1) + 5

a(a2 + a + 1) + 5 = 0 + 5

a(a2 + a + 1) + 5 = 5

(ii)

Substituting a = 1 in the expression

(iii) Substituting a = -1 in the expression

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