Question

if x = -1 and x = +1 are the zeros of the polynomials 9 x3 + x2 -2x +b​

Answer 1

Answer:

Step-by-step explanation:

a−b,a,a+b are zeroes of x

3

−3x

2

+x+1

⇒a−b+a+a+b= sum of zeroes = 3

⇒3a=3

⇒a=1

(a−b)(a)(a+b)= product of zeroes =−1

⇒(1−b)(1+b)=−1

⇒1−b

2

=−1

⇒b

2

=2

⇒b=±

2

​