Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


      y =   √(x²-9)
         the domain of  y is the set of all real numbers x such that
            x²-9 is non-negative    that is     x² -9 ≥  0
                                                thus   x  ≥    3
1 5 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts