Question

If (x - 2) and (x + 1) are the factors of the expression 2x ^ 4 - a * x ^ 3 + x + b then the value of b is

Answer 1

Answer:

f(x)=2x

3

−px

2

+x+q

f(−1)=−2−p−1+q=0$

or p−q=−3...(1)

f(x)=16−4p+2+q=0

or 4p−q=18...(2)

Solving (1) and (2) we have p=7,q=10