Question

What's the domain of f(x)=sqrt(3x+9)-1

Answer 1

\(3x+9 \ge 0\)

You tell me why.

Answer 2

I got x+3 >with the line 0

Answer 3

Subtract 3 and you'll be done. Now, tell me why that worked.

Answer 4

you divide the 3 to get x alone and 9 divided by 3 is 3 then you have to get x alone so that's why it works

Answer 5

No,

1) You should get \(x \ge -3\).
2) That's what the arithmetic did. Why did that give us the answer?