Question

Evaluate f(g) =3g2-4g+5 for g=-5

Answer 1

3g^2 - 4g + 5
3(-5)^2 -4(-5) + 5
75 + 20 + 5
100

Answer 2

Please, next time, post exponents with the sign ^,
I interpret the above function as
f(g)=3g^2-4g+5
so
f(-5)=3(-5)^2-4(-5)+5
=3(25)-4(-5)+5
=75+20+5
=100