Question

Find the domain.9-x² <0

Answer 1

• 9-x²<0
• x²>9
• x>√9
• x <-3 and x >-3
• x€ (-oo,-3)U(3,oo)

Lets simply

For values x<-3

Let it be -4

• 9-4²=-7 which is <0

Same for x >3