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Question

Simplify a(a2+a+1)+5 and find its value for a=1.
  1. a3+a+5;
    8
  2. a2+a+5;
    4
  3. a3+a2+a+5;
    8
  4. a3+a2+a+5;
    0

A
a3+a2+a+5;
8
B
a3+a2+a+5;
0
C
a3+a+5;
8
D
a2+a+5;
4
Solution
Verified by Toppr

a(a2+a+1)+5
=a3+a2+a+5

Putting the value of a=1, we get,
a3+a2+a+5
=13+12+1+5
=1+1+1+5
=8

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