Question

how to find domain for this question y= sqrt(x^2+x-2)

Answer 1

A domain is what x is allowed to be in your function

You can't take the square root of a negative.

So your domain is the solution to

x^2 + x - 2 >= 0

Answer 2

-2 and 1

Answer 3

Those are the solutions to x^2 + x - 2 = 0
Remember we are solving x^2 + x - 2 >= 0
So you get (x + 2)(x - 1) >= 0
Now set up a number line to get your solution ranges.
So the domain is x <= -2 or x >= 1

Answer 4

ok...i know....thanks u... coz this is sqrt...so just take positive part only right....