Answer:
Domain:  set of all real numbers
Range:  
Step-by-step explanation:
We have to find the domain and range of the function:

This is a quadratic function, shape of a "U", that's called a parabola.
The domain is the set of x values for which the function is defined.
The range is the set of y values for which the function is defined.
Normally, any parabola in the form   has domain as "all real numbers". This is the case for this problem as well, thus,
  has domain as "all real numbers". This is the case for this problem as well, thus,
Domain = set of all real numbers
Now, for the range, we have to look at the minimum value of the function. So, the range would be y values greater than or equal to the minimum number. Lets find the minimum value of this function.
We have to find the value of x for which the minimum occurs by using the formula:

<em><u>Note: value of a is "5" and b is "10"</u></em>
Now, we plug this into the function to find the minimum value:

So, the range is set of all real numbers greater than or equal to -5.