Q : 4  (b)         Simplify \small a(a^2+a+1) + 5   and find its value for 

                        (i) \small a =0

Answers (1)

We have :                    \small a(a^2+a+1) +5 = a^3 + a^2 + a +5

Put a = 0 :                       = 0^3 + 0^2 + 0 + 5 = 5

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