Answer:
5
Step-by-step explanation:
Here, the given function,
[tex]f(x)=x^2----(1)[/tex]
[tex]g(x)=x^2+5----(2)[/tex]
Let g(x) is obtained by adding k to f(x),
That is,
[tex]g(x)=f(x)+k[/tex]
From equations (1) and (2),
[tex]x^2+5=x^2+k[/tex]
[tex]\implies k = 5[/tex]
Hence, g(x) is obtained by adding 5 to f(x).