Verified answer

(f °g)(x) = f[g(x)] = f[3x + 5] = (3x + 5)² + 4 = 9x² + 30x + 29

( f o g ) ( x )

f ( 3 x + 5 )

( 3x + 5 )^2 + 4

9x^2 + 30 x + 29

(fog)(x) = f(g(x))

f(g(x)) = (3x + 5)^2 + 4 = (9x^2 + 30x + 25) + 4 = 9x^2 + 30x + 29

The other guys wrong

f(g(x))= (3x+5)^2+4

f(g(x))= 9x^2+30x+29

to solve (fog)(x), u'l hv to substitute the value of g(x) at the place of all the x in f(x)....

proceed like.... (fog)(x)= (3x+5)^2 + 4

=> (fog)(x)= [9(x^2) + 30x + 25] +4

=> (fog)(x)= 9 (x^2) + 30x + 29

(f o g)(x)=f {g(x)}

{(3x+5)^2}+4

9x^2+30x+29