Question

Simplify: a(a^2 + a + 1) + 5 and find its value for (i) a = -1

Answer 1

Answer:

Hope it you!!

Step-by-step explanation:

a ( a² + a +1 ) + 5

=( -1 ) { (-1 )² + ( -1 ) + 1 )} + 5

= -1 ( 1 -1 +1 ) + 5

= - 1 × 1 + 5

= -1 + 5

=4

Answer 2

Hey there,

We are given -

a(a²+a+1) + 5

we can also write it as a³+a²+a+5

now f(a) = a³+a²+a+5

if a = -1

for f(-1) = (-1)³ + (-1)² + (-1) + 5

= (-1) + 1 -1 + 5

= 5 - 1

= 4

therefore, answer is 4

HOPE IT HELPS

THANKS