Question

(b) Simplify a(a² + a +1) +5 and find its value for (i) a=0, (i)a=1
(iii) a=-1.


plzzz guys do it afap​

Answer 1

Answer:

a(a

2

+a+1)+5

=a

3

+a

2

+a+5

At a=1

=1

3

+1

2

+1+5

=1+1+1+5

=8

Answer 2

Answer:

$a^{3} + a^{2} + a +5 = 0$

$a^{3} + a^{2} + a = -5$

(i) Taking a as 0

0 + 0 + 0 = -5

= -5

(ii) Taking a = 1

1 + 1 + 1 = -5

= -8

(iii) Taking a = -1

-1 + 1 - 1 = -5

= -4