Question 1128439
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b. 
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Find (f+g)(x)=x^2+2x-3
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{{{f+g=x^2+2x-3}}}
Yes because that is the sum of f and g; the meaning of (f+g)(x).


The RANGE for {{{(f+g)(x)=x^2+2x-3}}} ?
The function is a polynomial, and all real values for x are allowed (domain).
The function is a parabola with a minimum point vertex.  

{{{x^2+2x+1-1-3}}}
{{{x^2+2x+1-4}}}
{{{(x+1)^2-4}}}

Vertex, a minimum point, is  (-1,-4).


RANGE:  The real numbers greater than or equal to negative four.