Find the domain of the function f(x)= -x^2 + 2x +3?

Question

I've tried to find the domain on this one but I keep coming up with the wrong answer. I know its simple but I'm trying to brush up on my math since I did no math all summer. lol :P

Answer 1

its all real

if you want the range, just find vertex (-b/2a,f(-b/2a)), and it would be all real below the y value of this.

make it a good day

Answer 2

try factoring it maybe? i dont know what ya mean by domain but if ya factor it ya get f(x)=(x-1)(x+3) i hope that helps a bit. if ya want email me and tell me what ya mean by range.  

Answer 3

ask your teacher to get the best answerS!

Answer 4

there is no such answer

u cant square -x