I think you’re answer is option 1: 3x^2+5.
Explanation:
Evaluate f(x^2+2) by substituting in the value of g into f.
f(x^2+2)=3(x^2+2)-1
Then apply distributive property.
f(x^2+2)=3x^2+3•2-1
Then multiply 3 by 2.
f(x^2+2)=3x^2+6-1
Then subtract 1 from 6.
f(x^2+2)=3x^2+5
