Question

if both x+1 and x-1 are factor of ax^3+x^2-2x+b . find the value of a and b​

Answer 1

Answer:

Step-by-step explanation:

Let f(x) = ax3 + x2 − 2x + b be the given polynomial. By factor theorem, if (x+1) and (x-1)both are factors of the polynomial f (x). if f(−1) and f(1) both are equal to zero. Hence, the value of a and b are 2 and −1 respectively.