Question

Is -1 a factor of f(x)=X2 -1?​

Answer 1

$\sf{\pmb{CORRECT\;QUESTION:}}$

• Is x-1 a factor of f(x)=x²-1

$\sf{\pmb{ANSWER:}}$

Let f(x) = x²-1

Divisor = x-1

Apply Remainder Theorem ,

⟹x-1=0

⟹x=1

•°•f(x)=${1}^{2}$-1

f(x) = 0

• So by factor theorem ,(x-1) is a factor of f(x)=x²-1