Practice problem
Find the domain of f(x)=x−8x2+8x−9f(x)=\dfrac{x-8}{x^2+8x-9}f(x)=x2+8x−9x−8.
All real numbers except −8,−9,-8, -9,−8,−9, or 111.
All real numbers except −8-8−8.
All real numbers except 8,9,8, 9,8,9, or −1-1−1.
All real numbers except −9-9−9 or 111.
Type a concept, like “slope” or “photosynthesis”.
