Question

find the value of A and B so that X square + 3 x cube + 8 x square + a x + b exactly by X square + 1​

Answer 1

Step-by-step explanation:

set x^2+1=0

or x=1or

x=-1

a+b=-12.....(1)

a-b=6..........(2)

on solving 1 and 2

we get a=-3

b=-9

Answer 2

Hence, the value of a = -3 and b= -9

HOPE THIS COULD HELP!!!