Question

Simplify a (a

2

+ a + 1) + 5 and find its value for (i) a = 0, (ii) a = 1

(iii) a = – 1.​

Answer 1

Answer:

option. iii

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

a(a^2+a+1)+5=a×a^2+a×a+a×1+5

a^3+a^2+a+5

(1) for a = 0,a^3+a^2+a×5 =(0)^3+(0)^2+(a)+5

=0+0+0+5=5

(2) for a=1, a^3 +a^2+a+5=(1)^3+(1)^2+(1)+5

1+1+1+5=8

(3) for a=-1,a^3+a^2+a+5=(-1)^3+(-1)^2+(1)+5

=-1+1-1+5=4