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

                  (ii) \small a=1

Answers (1)

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

Put a = 1 ,

 we get :           1^3 + 1^2 + 1 + 5 = 1 + 1 + 1+ 5 = 8

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