The function g is defined by g:x^2 – 4x + 11, x<=0. (b) Find the range of g.
As it says x<=0, would you substitute 0 into g which gives you 11 and that's the range?
Or do you complete the square of g and then find the range?
I always get confused don't know whether to substitute the range of x they give you to find the range of y or to complete the square/ factorise and then to find the range by drawing the diagram?