Question

For all values of x, f(x)=x^2 g(x)= x+3 find fg(5) and gf(5)

Answer 1

fg(5) = 64 and gf(5) = 28

Explanation:

Given

f(x) = x²

g(x) = x + 3

Now

fg(5)

= f ( 5 + 3 )

= f( 8)

= 8²

= 64

Also

gf(5)

= g(5²)

= g( 25)

= 25 + 3

= 28

Hope it will help :)